Relevant bibliographies by topics / Sedimentation and deposition – Champlain, Lake

Academic literature on the topic 'Sedimentation and deposition – Champlain, Lake'

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Published: 10 December 2022
Last updated: 28 January 2023

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Journal articles on the topic "Sedimentation and deposition – Champlain, Lake"

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Normandeau, Alexandre, Patrick Lajeunesse, Annie-Pier Trottier, Antoine G. Poiré, and Reinhard Pienitz. "Sedimentation in isolated glaciomarine embayments during glacio-isostatically induced relative sea level fall (northern Champlain Sea basin)." Canadian Journal of Earth Sciences 54, no. 10 (October 2017): 1049–62. http://dx.doi.org/10.1139/cjes-2017-0002.

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The nature of glaciomarine sediments deposited during ice margin retreat can vary according to physiographic setting and relative sea level fluctuations. To understand the effects of these two parameters on sedimentation, we analyzed the sediment records of four lakes located within former isolated glaciomarine embayments of the northern Champlain Sea basin. These lakes were initially inundated by marine water of the Champlain Sea, following deglaciation, and have subsequently experienced basin isolation owing to glacio-isostatic rebound. Three of these lakes reveal a common litho- and acoustic stratigraphic succession, characterized by an IRD-free glaciomarine to marine facies consisting of homogeneous to faintly laminated clayey silts grading into well-laminated silts with rapidly deposited layers. These two units recorded the transitional environment from glaciomarine sedimentation below multiyear shorefast ice to increased terrestrial runoff and rapid glacio-isostatic rebound once the ice margin retreated inland. During ice margin retreat, relative sea level fell concomitantly resulting in the deposition of coarser sediments in marine embayments. Upon the complete retreat of the ice margin, the supply of terrestrial sediments diminished and lake isolation, driven by relative sea level fall, led to higher biogenic content and increased bioturbation. This study provides a framework for sedimentation in isolated glaciomarine embayments which differs from deep-water sedimentation owing to the presence of shorefast sea-ice and their protected location from major ice-stream outlets.
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Hersi, Osman Salad, and George R. Dix. "Hog's Back Formation: a new (Middle Ordovician) stratigraphic unit, Ottawa Embayment, eastern Ontario, Canada." Canadian Journal of Earth Sciences 34, no. 5 (May 1, 1997): 588–97. http://dx.doi.org/10.1139/e17-047.

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The Hog's Back Formation, exposed in Ottawa, Ontario, is a new stratigraphic unit that disconformably overlies the Rockcliffe Formation and underlies, with apparent conformity, the Pamelia Formation of the Ottawa Group. The Hog's Back Formation is 14.3 m thick at its type section (Prince of Wales Falls, Ottawa) and thickens eastward to 27 m in Russell County, about 40 km southeast of Ottawa. It consists of lower, dark green shales with thin lime-mudstone and sandstone interbeds, and upper thin to thick beds of fine crystalline greenish grey sandy and calcareous dolostones with thin to medium (10–30 cm) pinkish grey, bioclastic packstone and grainstone interbeds. The latter thicken eastward and correlate with the "St. Martin calcarenites" of the Beaconsfield Member, Laval Formation, in the Montréal area. Together, these beds correlate with the Valcour Formation, Chazy Group, in the Lake Champlain area of New York. Conodonts and macrofossils indicate a Chazyan (Llandeilian) age for the Hog's Back Formation. The lower sandstone–shale–carbonate assemblage of the formation indicates sedimentation in peritidal environments, and documents initial regional flooding of nearshore sandy facies of the Rockcliffe Formation. The overlying carbonate facies represent sabkha environments punctuated by storm deposition. The gross shallowing-upward succession of the formation was terminated by renewed flooding associated with another regional transgressive event heralding deposition of the Ottawa Group.
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Naldrett, Dana L. "Sedimentology, Stratigraphy and Micropaleontology of Pre- and Early-Champlain Sea Fine-Grained Facies from the Foster Sand Pit, Ottawa, Ontario." Géographie physique et Quaternaire 42, no. 2 (December 18, 2007): 181–89. http://dx.doi.org/10.7202/032724ar.

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ABSTRACT The Foster sand pit exposes pre- to late-Champlain Sea sediments containing 4 litho/biofacies. These are, from oldest to youngest: Faciès 1- cross-stratified sand and diamicton deposited as late-glacial, ice-proximal subaqueous outwash. Faciès 2- laminated silt and clay rhythmites with a sparse Candona cf. C. subtriangulata ostracode fauna deposited in a deep, proglacial lake preceding the Champlain Sea, Fades 3- massive to rarely laminated silty clay with dominant foraminifera Elphidium bartletti, Protelphidium orbiculare and Cassidulina crassa represents the first glaciomarine deposition in Champlain Sea water 30-100 m deep with a paleosalinity of 22-33 %o. Faciès 4- mixed bedding of sand and mud, with a microfossil assemblage dominated by the Elphidium/Protelphidium complex representing an intertidal offlap sequence. Water depths during deposition of Faciès 4 dropped to 10-30 m. and paleosalinity dropped to 18-28 %o.. This study recognizes a pre-Champlain Sea proglacial lake, assigns subaqueous outwash deposits to an earlier time than previously believed and documents changes in bottom water characteristics of the early Champlain Sea based on sedimentary and microfossil evidence.
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Jonas, Jory L., Randall M. Claramunt, John D. Fitzsimons, J. Ellen Marsden, and Brian J. Ellrott. "Estimates of egg deposition and effects of lake trout (Salvelinus namaycush) egg predators in three regions of the Great Lakes." Canadian Journal of Fisheries and Aquatic Sciences 62, no. 10 (October 1, 2005): 2254–64. http://dx.doi.org/10.1139/f05-141.

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Excessive mortality from spawning through the first year of life is likely responsible for recruitment failures in many lake trout (Salvelinus namaycush) populations. We evaluated relationships between interstitial predator species and lake trout egg deposition in three regions of the Great Lakes. The introduced crayfish Orconectes rusticus dominated the nearshore zone in northern Lake Michigan, whereas other sites in Lake Michigan and Parry Sound were dominated by native Orconectes propinquus. In Lake Champlain, sculpin (Cottus spp.) were the most common interstitial predator, yet densities were comparable with those in Lake Michigan. Predator densities in Lake Michigan (mean ± standard error = 15.5 ± 0.4 predators·m–2) were twice those in Lake Champlain or Parry Sound (6 ± 1 predators·m–2). Densities of eggs were higher in Lake Champlain (2994.1 ± 398.3 eggs·m–2) and Parry Sound (454.7 ± 36.3) than in Lake Michigan (7.5 ± 1.3; Kruskal-Wallis, P ≤ 0.05). Ratios of eggs to predator provide simple measures of the effectiveness of lake trout rehabilitation efforts. The average ratio calculated from 10 successful spawning locations is 190 eggs·predator–1·m–2. Ratios may help establish target egg densities for restoration efforts and the concentration of spawning adults required to allow survival to the fry stage.
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Rayburn, John A., Thomas M. Cronin, David A. Franzi, Peter L. K. Knuepfer, and Debra A. Willard. "Timing and duration of North American glacial lake discharges and the Younger Dryas climate reversal." Quaternary Research 75, no. 3 (May 2011): 541–51. http://dx.doi.org/10.1016/j.yqres.2011.02.004.

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AbstractRadiocarbon-dated sediment cores from the Champlain Valley (northeastern USA) contain stratigraphic and micropaleontologic evidence for multiple, high-magnitude, freshwater discharges from North American proglacial lakes to the North Atlantic. Of particular interest are two large, closely spaced outflows that entered the North Atlantic Ocean via the St. Lawrence estuary about 13,200–12,900 cal yr BP, near the beginning of the Younger Dryas cold event. We estimate from varve chronology, sedimentation rates and proglacial lake volumes that the duration of the first outflow was less than 1 yr and its discharge was approximately 0.1 Sv (1 Sverdrup = 106 m3 s−1). The second outflow lasted about a century with a sustained discharge sufficient to keep the Champlain Sea relatively fresh for its duration. According to climate models, both outflows may have had sufficient discharge, duration and timing to affect meridional ocean circulation and climate. In this report we compare the proglacial lake discharge record in the Champlain and St. Lawrence valleys to paleoclimate records from Greenland Ice cores and Cariaco Basin and discuss the two-step nature of the inception of the Younger Dryas.
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Liverman, David G. E. "Sedimentation in ice-dammed Hazard Lake, Yukon." Canadian Journal of Earth Sciences 24, no. 9 (September 1, 1987): 1797–806. http://dx.doi.org/10.1139/e87-171.

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"Hazard Lake," located in Kluane National Park, the Yukon, is an ice-dammed lake formed in 1966 by the surge of the Steele Glacier. Since 1975 it has drained annually by means of a subglacial tunnel. During July 1979, observations were made of lake processes before drainage and of sections described in the lake bottom after drainage. Three facies associations are believed to represent prelake, stable lake, and annual draining phases. Gravel commonly found at the base of sections represents deposition in a braided fluvial system prior to 1966. Lake sediments deposited between 1966 and 1975 are dominantly graded laminated silt deposited by turbid underflow from the major inflow stream. Lamination is probably caused by diurnal underflow events or daily variation in strength of underflow. No "winter" clay component of varved sediments is observed. During drainage a regressive sequence is deposited as the lake level drops, with sand-dominated sediments overlapping laminated silt where the main inflow stream enters the lake. This is followed by local fluvial deposition along the course of the reestablished stream. During filling a transgressive sequence is deposited as the lake level rises. Sand-dominated deltaic sedimentation is followed by deposition from underflow, resulting in laminated and massive silt and clay. These fine-grained facies separate sand facies and demark individual filling events but are easily eroded. Thus it is not possible to identify the effects of each individual drainage–filling cycle in the sediments. After drainage the lake remains empty until the next melt season, during which time a braided stream is established in the lake basin, depositing sands and gravels and eroding lake sediments.
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Kusumgar, Sheela, D. P. Agrawal, and Prabhakar Sharma. "Radiocarbon Chronology and Magnetic Susceptibility Variation in Kumaon Lake Sediments." Radiocarbon 31, no. 03 (1989): 957–64. http://dx.doi.org/10.1017/s0033822200012583.

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This study was carried out to determine time controls of erosion and sedimentation in the catchment area and lakes of the Naini Tal district in the Kumaon Himalayas. We present here our preliminary data from five lakes, Beon Tal, Garud Tal, Sukha Tal, Bhim Tal and Kamal Tal (Naukuchia Tal). A number of 14C dates are now available to estimate the sedimentation rate of the five lakes and magnetic susceptibility (xL; xfd) variation to determine the signature of sediment source. High xfd values indicate a higher proportion of soil component generally characterized by a slower rate of deposition, and low xfd values with a higher rate of sedimentation indicate rock-debris-derived sediment. A 14C chronology enables us to estimate the mean sedimentation rate whereas rock magnetic properties help us to characterize the type of source responsible for sedimentation.
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Leonard, Eric M. "Varve Studies at Hector Lake, Alberta, Canada, and the Relationship Between Glacial Activity and Sedimentation." Quaternary Research 25, no. 2 (March 1986): 199–214. http://dx.doi.org/10.1016/0033-5894(86)90057-8.

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Glacial lake sedimentary records from Hector Lake in Banff National Park, Alberta, are examined with the aim of clarifying the relationship between glacial activity and outwash sedimentation. Rhythmic couplets in lake bottom sediments provide a method for accurate documentation and dating of recent sedimentation chronology, as analysis of 137Cs content indicates that the couplets are of annual periodicity (i.e., varves). A comparison of sedimentation rate records with recent regional glacial history indicates that high sedimentation rates of one to a few decades duration occur either during and immediately following periods of moraine deposition (ie, maximum ice stands) or during periods of rapid ice recession. Comparison of sedimentary records with somewhat longer term glacial and vegetation records indicates that sedimentation rate variations of several centuries duration closely parallel changes in upvalley ice extent. Over this time scale, high sedimentation rates occur during periods of relatively increased ice extent, low rates during periods of reduced ice extent. Within this general pattern, however, sedimentation rates may remain very high for nearly a century following maximum ice stands, due to the exposure of unstable glaciogenic deposits to fluvial reworking during ice recession.
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Cuddington, K., and P. R. Leavitt. "An individual-based model of pigment flux in lakes: implications for organic biogeochemistry and paleoecology." Canadian Journal of Fisheries and Aquatic Sciences 56, no. 10 (October 1, 1999): 1964–77. http://dx.doi.org/10.1139/f99-108.

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Vertical fluxes of pigments are used in limnology to monitor phytoplankton abundance, herbivore grazing, ecosystem efficiency, and historical changes in production. However, significant pigment degradation can occur during algal sedimentation. We used an individual-based model of pigment flux to quantify the relative importance of production and degradation as controls of pigment sedimentation. Pigment deposition increased with production, sinking rate, and phytoplankton depth and declined as lake depth and the depth of oxygen penetration increased. Unexpectedly, pigment sedimentation rate was not sensitive to variation in photooxidation rates, even though bleaching accounted for the second greatest amount of pigment loss. Digestion by zooplankton caused the most pigment degradation, but grazing increased pigment deposition when digestive losses were less than those due to oxidation of pigments in ungrazed cells. The model suggests that algal production may be underestimated in sedimentation studies that do not consider variability in water column depth. Further, comparisons with paleoecological analyses suggest that some inferred increases in production during lake ontogeny may arise from changes in regulation of pigment fluxes rather than from increased algal production.
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Burke, J., M. Hoyer, G. Keeler, and T. Scherbatskoy. "Wet deposition of mercury and ambient mercury concentrations at a site in the Lake Champlain basin." Water, Air, & Soil Pollution 80, no. 1-4 (February 1995): 353–62. http://dx.doi.org/10.1007/bf01189685.

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Dissertations / Theses on the topic "Sedimentation and deposition – Champlain, Lake"

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Roop, Heidi Anne. "Sedimentation in a proglacial lake : interpreting intra- and inter-annual sedimentation in Linnévatnet, Spitsbergen, Norway /." Connect to online version, 2007. http://ada.mtholyoke.edu/setr/websrc/pdfs/www/2007/235.pdf.

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Undergraduate honors paper--Mount Holyoke College, 2007. Dept. of Earth and Environment.
Includes one CD-Rom appendix of 2005-2006 grain size data. Includes bibliographical references (leaves 125-129).
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Clifford, Philip A. (Philip Alan). "Aquatic Vegetation Nutrient Budgets and Sedimentation in a Southwestern Reservoir." Thesis, North Texas State University, 1986. https://digital.library.unt.edu/ark:/67531/metadc504467/.

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During four growing seasons, aquatic vascular plant production and distribution were studied in Pat Mayse Lake, Texas, a 2425 hectare oligo-mesotrophic reservoir. The dominant macrophyte population was Myriophyllum spicatum L. Growth rates and regrowth rates of mechanically harvested Myriophyllum beds were found to be dissimilar. Based on estimates of watermilfoil nutrient content, there were insufficient nutrients in the entire population to alter the trophic status of this reservoir should all of the nutrients be instantaneously released. Sediments were the primary nutrient (nitrogen and phosphorus) sink. Bank erosion and solids transport from the watershed appear to contribute most of the sediments and a lake-wide mean sedimentation rate of 2.5 cm/year was estimated from sediment trap and core sample data.
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Chiu, Hon-chim, and 招侃潛. "Sedimentology and geomorphology of modern and relict lake systems in Tibet." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2011. http://hub.hku.hk/bib/B46478243.

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Smirnov, Anna. "Polycyclic aromatic hydrocarbons in sediments of Lake Erie, Great Lakes : spatial distribution, sources and pathways /." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp04/mq23174.pdf.

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Owens, Philip Neil. "Lake sediment-based sediment yields and erosion rates in the Coast Mountains, British Columbia." Thesis, University of British Columbia, 1990. http://hdl.handle.net/2429/29695.

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Lake sediments have been identified as an alternative to contemporary stream monitoring to establish catchment sediment yields and infer erosion rates. This is due primarily to the longer time period over which the former is based, which makes established yields and rates more representative of means or trends in sedimentation. Studies using lake sediments to establish sediment yields have generally assumed that all the sediment contained within a lake is derived from erosion of the catchment under investigation. This study undermines this assumption by constructing a comprehensive lake sediment budget to asses the relative contributions from various sources. Late Holocene (the last 2350 years) rates of sediment yield and erosion are established for 3 small (<1 km²) catchments that straddle timberline (1620 - 1850 m above sea level) in the Coast Mountains of British Columbia. Due to the temporal and spatial variability of sedimentation in lakes, sediment cores for each lake were taken using a multiple-core approach. Chronology was established by the presence of a dated tephra layer. Once the cores were extracted, corrections were made for sediment derived from aquatic productivity (organic matter and biogenic silica), regional aeolian dust input, the erosion of lake banks and for outflow losses. These sources of sediment could account for between 55 and 99% of the sediment contained within the 3 lakes. Lake trap efficiency ranges from low to >70%. Once corrected, estimates of sediment yield range from 4 and 244 kg km⁻²yr⁻¹. The rate of regional aeolian deposition indicates that, in certain areas, these catchments are undergoing net deposition and not net erosion. The implications for lake sediment-based sediment yields and erosion rates are examined. When placed in a regional context sediment yields are more than 1 order of magnitude lower than larger scale basins due to changes in sediment storage. The spatial and temporal representativeness of the data are also evaluated.
Arts, Faculty of
Geography, Department of
Graduate
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Mangan, Carmel Mary. "The sequestration of phosphate by iron phases in the sediments from Lake Rotorua, New Zealand." The University of Waikato, 2007. http://hdl.handle.net/10289/2238.

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A sequential extraction method was used to determine which dominant sedimentary mineral phase was involved in phosphorus retention in the sediments of Lake Rotorua and to verify the importance of iron phases in the role as a phosphorus sink. The observed influence of the experimental conditions upon the extent of phosphate adsorption to various iron phases shows a considerable quantity of phosphorus is present in the reducible phase and in the residual mineral phase. The phosphorus associated with iron(III) oxide phases was released into solution under reducing conditions when ferric iron oxide/oxyhydroxides, including amorphous and poorly crystalline Fe(III) phases, were solubilized. The residual primary and secondary mineral phases remained stable in the sediments until they were exposed to extremely acidic media analogous to strongly reducing conditions. Manganese is not involved in phosphorus retention to the same extent as iron. Aluminium phases present were released from surface complexes with relative ease and also from mineral structures under the prevailing conditions. The results show a strong agreement between aluminium and phosphorus suggesting it is associated with various aluminium phases to some extent. The sediments of Lake Rotorua are rich in organic-bound P which is released when organic material is oxidized under conditions analogous to anaerobic degradation. The degradation of refractory organic material represents a significant source of phosphorus for incorporation into diagenetic minerals forming in oxic and anoxic layers of the sediment. Heavy liquid separation of the sediments concentrated the small quantities of dense minerals into a separate fraction and the presence of iron sulfides could be verified. Three density fractions obtained by this method separated the diatoms (d less than 2.6 g cm-3), the silicates (d greater than 2.6 less than 3.7 g cm-3) and the heavy minerals (d greater than 3.7 g cm-3) present in the sediment sample. In the heavy mineral phase spherulitic framboidal pyrite and rhombohedrial siderite were observed by scanning electron microscopy (SEM). Energy dispersive x-ray fluorescence (XRF) analysis of the framboidal pyrite detected significant fluorescence's for sulphur and iron. The elemental analysis of siderite characterised it as an iron-rich, non-sulfidic particle with no phosphorus fluorescence. Particles were also observed that had a variable morphology to the framboidal pyrite minerals but similar ratio of Fe to S in the XRF spectrum. It is likely they are other stable forms of iron sulfides or pyrites in various stages of diagenetic dissolution. Digestion of the three density fractions shows the heavy mineral phase is significantly enriched in sulfur and in iron confirming the presence of sulfides. The sulfide-forming trace metals are concentrating in the heavy mineral phase but a progressive enrichment of trace metals down core is not found in the results. Many of the trace elements show maximum concentrations in the Tarawera tephra. There is a good agreement between iron and phosphorus in both treatments that implies iron phases are the predominant phosphorus fixers in the sediments of Lake Rotorua. However the identity of the phosphorus sink could not be confirmed by SEM or XRF analysis of the heavy minerals. The most likely explanations for the observed concentrations of iron and phosphorus and enrichment in the heavy mineral fraction are the persistence of the highly insoluble crystalline iron oxyhydroxides (goethite) in reducing sediments or the formation of the reduced iron mineral vivianite. Considering the density of vivianite it would have being taken into the heavy fraction by default which would account for the enrichment demonstrated by the solution analysis.
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Tang, Chao. "Microbial diversity studies in sediments of perennially ice-covered lakes, McMurdo Dry Valleys, Antarctica." Diss., [Riverside, Calif.] : University of California, Riverside, 2009. http://proquest.umi.com/pqdweb?index=0&did=1957340921&SrchMode=2&sid=1&Fmt=2&VInst=PROD&VType=PQD&RQT=309&VName=PQD&TS=1269022997&clientId=48051.

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Thesis (Ph. D.)--University of California, Riverside, 2009.
Includes abstract. Available via ProQuest Digital Dissertations. Title from first page of PDF file (viewed March 20, 2010). Includes bibliographical references. Also issued in print.
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Furuichi, Takahisa. "Soil erosion and sedimentation in the Lake Inle catchment, Myanmar (Burma)." Phd thesis, 2007. http://hdl.handle.net/1885/149643.

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Jenson, John W. "A nonlinear numerical model of the Lake Michigan Lobe, Laurentide Ice Sheet." Thesis, 1993. http://hdl.handle.net/1957/35632.

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Evans, M. D. "A geomorphological and sedimentological investigation into the glacial deposits of the Lake Clearwater basin, Mid Canterbury, New Zealand : a thesis submitted in partial fulfilment of the requirements for the degree of Master of Science in Geology in the University of Canterbury /." 2008. http://hdl.handle.net/10092/1531.

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Books on the topic "Sedimentation and deposition – Champlain, Lake"

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Berkas, Wayne R. Sedimentation of Lake Taneycomo, Missouri, 1913-1987. Rolla, Mo: Dept. of the Interior, U.S. Geological Survey, 1989.

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Håkanson, Lars. Principles of lake sedimentology. Caldwell, N.J: Blackburn Press, 2002.

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Renn, Danny E. Sedimentation in Versailles Lake, Ripley County, southeastern Indiana, 1956-88. Indianapolis, Ind: U.S. Dept. of the Interior, U.S. Geological Survey, 1991.

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Gadd, N. R. Lithofacies of Leda Clay in the Ottawa Basin of the Champlain Sea. Ottawa, Canada: Geological Survey of Canada, 1986.

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Khobragade, S. D. Sedimentation in lakes. Roorkee: National Institute of Hydrology, 1994.

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Weaver, J. Curtis. Sediment characteristics and sedimentation rates in Lake Michie, Durham County, North Carolina, 1990-92. Raleigh, N.C: U.S. Dept. of the Interior, U.S. Geological Survey, 1994.

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Reed, Lloyd A. Sediment deposition in Lake Clarke, Lake Aldred, and Conowingo Reservoir, Pennsylvania and Maryland, 1910-93. Lemoyne, Pa: U.S. Dept. of the Interior, U.S. Geological Survey, 1997.

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Mau, David P. Sediment deposition and selected water-quality characteristics in Cedar Lake and Lake Olathe, northeast Kansas, 2000. Lawrence, Kan: U.S. Dept. of the Interior, U.S. Geological Survey, 2002.

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Song Liao hu pen jing xi chu ceng chen ji xue yan jiu. Beijing: Shi you gong ye chu ban she, 2009.

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Hodder, A. P. W. A selected bibliography on sedimentation in lakes and reservoirs. Wellington: New Zealand Oceanographic Institute, 1985.

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Book chapters on the topic "Sedimentation and deposition – Champlain, Lake"

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Manley, Patricia L., Thomas O. Manley, James H. Saylor, and Kenneth L. Hunkins. "Sediment deposition and resuspension in Lake Champlain." In Water Science and Application, 157–81. Washington, D. C.: American Geophysical Union, 1999. http://dx.doi.org/10.1029/ws001p0157.

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Burke, J., M. Hoyer, G. Keeler, and T. Scherbatskoy. "Wet Deposition of Mercury and Ambient Mercury Concentrations at a Site in the Lake Champlain Basin." In Mercury as a Global Pollutant, 353–62. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-011-0153-0_39.

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WELLS, JOHN T., CHRISTOPHER A. SCHOLZ, and THOMAS C. JOHNSON. "HIGHSTAND DELTAS IN LAKE MALAWI, EAST AFRICA: ENVIRONMENTS OF DEPOSITION AND PROCESSES OF SEDIMENTATION." In Lacustrine Reservoirs and Depositional Systems, 1–35. SEPM (Society for Sedimentary Geology), 1994. http://dx.doi.org/10.2110/cor.94.01.0001.

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Cohen, Andrew S. "Facies Models at the Lake Basin Scale." In Paleolimnology. Oxford University Press, 2003. http://dx.doi.org/10.1093/oso/9780195133530.003.0012.

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Understanding the historical evolution of sedimentation in a lake requires not only a grounding in facies interpretation but also an understanding of the larger-scale, lakewide linkages between deposition and those factors influencing sedimentation. The facies models we examined in chapter 7 can be linked to understand the differences in deposits between lake basins. Basin-scale facies models focus on the major interactions between climate or tectonic/ volcanic activity and sedimentation, attempting to explain why particular facies types develop in particular areas or at particular times in a lake’s history. Here I will focus on a few examples from the most intensively studied depositional settings, including lake types defined by mode of origin and evolution (rifts, glacial lakes, etc.) as well as saline lakes and playas, which share chemical and climatic attributes. Large-scale facies modeling in rift lakes has been driven by a need to understand the occurrence of hydrocarbons in ancient rifts (Lambiase, 1990; Katz, 2001). This in turn spurred a rapid accumulation of seismic reflection and facies data in the East African rift lakes and Lake Baikal (Russia) during the 1980s and 1990s, as well as attempts to synthesize these data and integrate them into general models. As we saw in chapter 2, the evolution of rift basins involves the development of asymmetric half-grabens and, in larger lake systems, the linkage of these half-grabens in a linear chain. As rift basins age, progressive deformation will eventually cause extensive deformation on both sides of the basin, transforming them into asymmetric full grabens, as seen in Lake Baikal today. This pattern of tectonic development has consequences for geomorphology, sediment delivery rates and locations, and sediment composition, that also vary depending on whether the lake basin is relatively full (high-stand conditions) or empty (low-stand) (Rosendahl et al., 1986; Cohen, 1990; Scholz and Rosendahl, 1990; Tiercelin et al., 1992; Soreghan and Cohen, 1996). Large-scale depositional patterns in a rift lake therefore represent an interplay between tectonic and climatic forces, factors that operate on somewhat different time scales.
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Hickson, Thomas A., Kevin M. Theissen, and Melissa A. Lamb. "Microbialites right under our noses: Miocene and modern lakes near Las Vegas, Nevada, USA." In Field Excursions from Las Vegas, Nevada: Guides to the 2022 GSA Cordilleran and Rocky Mountain Joint Section Meeting, 109–24. Geological Society of America, 2022. http://dx.doi.org/10.1130/2022.0063(06).

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ABSTRACT On this field trip, we will examine a modern lake in central Nevada, the Lower Pahranagat Lake, and lacustrine carbonate outcrops of the late Miocene, upper Horse Spring Formation. Both of the modern and ancient systems hold significant microbialite populations and we interpret that the Lower Pahranagat Lake is a possible analog for the ancient unit. Both systems are or were spring-fed from a similar Paleozoic carbonate aquifer. Both have evidence of microbially influenced sedimentation, probably related to spring activity. Both are dominated by the deposition of carbonate to the exclusion of nearly all siliciclastic material. In the Lower Pahranagat Lake, we will focus on the Holocene depositional record of the lake and the microbialites that are found therein. Molecular genetic data from three sites near the Lower Pahranagat Lake suggest that carbonate deposition could be strongly mediated by varying and complex microbial communities, and that simple interpretations of carbonate geochemistry probably neglect this influence. In the Lake Mead area, we will examine both the vertical (stratigraphic) and lateral relationships between a wide diversity of microbial macro- and mesostructures, to critically evaluate the relative effects of climate change, variable lake chemistry, and the role of microbial mat metabolisms on microbialite geochemistry.
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TSUCHIDA, KUNIHIRO, AKIHIKO OKUI, YOSHINOBU YAMADE, NOBORU YAMAZAKI, and RYOTARO IWAHASHI. "The Application of a Linked Physical Ocean Circulation–Ecosystem Model to Prediction of Organic-Carbon Sedimentation in Lake Tanganyika, East African Rift System." In Deposition of Organic-Carbon-Rich Sediments: Models, 243–59. SEPM (Society for Sedimentary Geology), 2005. http://dx.doi.org/10.2110/pec.05.82.0243.

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"Balancing Fisheries Management and Water Uses for Impounded River Systems." In Balancing Fisheries Management and Water Uses for Impounded River Systems, edited by Tim Patton and Cris Lyday. American Fisheries Society, 2008. http://dx.doi.org/10.47886/9781934874066.ch11.

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<em>Abstract</em>.—While processes of depositional filling and ecological succession in natural lakes have been well described, these concepts are relatively new and seldom applied to reservoirs, especially at the landscape scale. However, ecological time has been sufficient to allow us to see successional processes in many reservoir systems. Illustrative of such processes, Lake Texoma is a 36,000-ha reservoir located in southern Oklahoma and northern Texas, and patterns of depositional filling and subsequent processes are apparent in the up-lake ends (there are two large-river tributaries) of this system. Completed in 1944, Lake Texoma has a drainage area of more than100,000 km2, most of which is highly erodable agricultural lands. We used historic aerial photographs, geographic information systems technology, and field measurements to examine a variety of surface and habitat features and analyzed experimental gill-net samples using ordination techniques to characterize the fish communities in portions of the reservoir most affected by sedimentation. Extensive sedimentation and accretion of sediments above water level has effectively resulted in surface area reduction, cove isolation, fragmentation of lacustrine habitats, morphometric changes, and establishment of terrestrial vegetation on newly deposited lands. Most notably, sedimentation has led to the development of linear bars of deposition above normal pool elevation that have blocked mouths of coves, bisected large areas of the reservoir, and fragmented several pools. In our study site alone, 332 ha (surface area) of reservoir has experienced accretion of land above the water level. Reservoir fragments had lower shoreline development values (mean = 2.21) than comparable control sites (mean = 3.39). Depositional shorelines associated with sedimentation exhibited lower gradients than nondepositional shorelines (mean = 2.0% versus 4.2%, respectively), and habitat heterogeneity was lower along depositional shorelines than along nondepositional shorelines. Fish communities in isolated reservoir fragments appeared to be distinct from fish communities in nonfragmented habitats. This change in community structure may be driven by an appreciable reduction of pelagic species from fragmented sites, as these sites have limited or no connectivity to the main body of the reservoir. With respect to the newly deposited lands, ecological succession of vegetation followed a progression from mud flats to dense, nearly monotypic stands of black willow Salix nigra forests within a few years. These habitat changes had strong implications to the fish communities as well as to adjacent terrestrial wildlife communities and will likely pose many challenges, and perhaps opportunities, for natural resource managers.
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Reynolds, Richard L., Joseph G. Rosenbaum, Donald S. Sweetkind, Marvin A. Lanphere, Andrew P. Roberts, and Kenneth L. Verosub. "Recognition of primary and diagenetic magnetizations to determine the magnetic polarity record and timing of deposition of the moat-fill rocks of the Oligocene Creede Caldera, Colorado." In Special Paper 346: Ancient Lake Creede: its volcano-tectonic setting, history of sedimentation, and relation to mineralization in the Creede mining district, 77–93. Geological Society of America, 2000. http://dx.doi.org/10.1130/0-8137-2346-9.77.

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Conference papers on the topic "Sedimentation and deposition – Champlain, Lake"

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Scholz, Christopher A., and Douglas Wood. "Early-Stage Extension in the Southwest East African Rift: Integration of New Seismic Reflection Data." In SPE/AAPG Africa Energy and Technology Conference. SPE, 2016. http://dx.doi.org/10.2118/afrc-2614293-ms.

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ABSTRACT The western branch of the East African Rift is characterized by modest amounts of extension and by deeply-subsided, fault-controlled basins filled with large, deep lakes. Lakes Tanganyika and Nyasa (Malawi) are two of the largest lakes in the world, with maximum water depths of 1450 and 700 m respectively. Newly acquired seismic reflection data, along with newly reprocessed legacy data reveal thick sedimentary sections, in excess of 5 km in some localities. The 1980's vintage legacy data from Project PROBE have been reprocessed through pre-stack depth migration in Lake Tanganyika, and similar reprocessing of legacy data from Lake Nyasa (Malawi) is underway. New high-fold and large-source commercial data have recently been collected in southern Lake Tanganyika, and new academic data have been acquired in the northern and central basins of Lake Nyasa (Malawi) as part of the 2015 SEGMeNT project. In the case of Lake Tanganyika, new data indicate the presence of older sediment packages that underlie previously identified "pre-rift" basement (the "Nyanja Event"). These episodes of sedimentation and extension may substantially predate the modern lake. These deep stratal reflections are absent in many localites, possibly on account of attenuation of the acoustic signal. However in one area of southern Lake Tanganyika, the newly-observed deep strata extend axially for ~70 km, likely representing deposits from a discrete paleolake. The high-amplitude Nyanja Event is interpreted as the onset of late-Cenozoic rifting, and the changing character of the overlying depositional sequences reflects increasing relief in the rift valley, as well as the variability of fluvial inputs, and the intermittent connectivity of upstream lake catchments. Earlier Tanganyika sequences are dominated by shallow lake and fluvial-lacustrine facies, whereas later sequences are characterized by extensive gravity flow deposition in deep water, and pronounced erosion and incision in shallow water depths and on littoral platforms. The age and provenance of the sub-Nyanja Event sequences is unknown, but may correlate to Miocene, Cretaceous or Karroo-age sedimentary packages documented elsewhere in the southwestern part of the East African Rift, including in the region around Lakes Rukwa and Nyasa (Malawi).
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