Bibliographies thématiques / MIKIR HILLS

Littérature scientifique sur le sujet « MIKIR HILLS »

Auteur : Grafiati
Publié le 18 mai 2024

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Articles de revues sur le sujet "MIKIR HILLS"

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Kayal, J. R., et Reena De. « Microseismicity and tectonics in northeast India ». Bulletin of the Seismological Society of America 81, no 1 (1 février 1991) : 131–38. http://dx.doi.org/10.1785/bssa0810010131.

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Abstract Three microearthquake surveys were carried out in Shillong Plateau, Mikir Hills, and Assam valley areas during 1984 to 1986. Some 422 events are relocated by the Homogeneous Station Method. The microseismicity map reveals intense crustal (10 to 40 km) activity beneath the Tura area of Shillong Plateau. The areas to the west of Shillong and the area around Mikir Hills also show high activity. The microseismicity map further shows major tectonic lineaments that are compatible with the Landsat Imagery lineaments and the major faults. Composite focal mechanisms of the microearthquakes show spatial variation of the tectonic stresses in the region. An ENE-WSW horizontal compressive stress is dominant in the Tura area, whereas a SE-NW horizontal compressive stress is dominant in the Shillong and Mikir Hills areas.
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Bera, S. K. « Modern pollen deposition in Mikir hills, Assam ». Journal of Palaeosciences 49, no (1-3) (31 décembre 2000) : 325–28. http://dx.doi.org/10.54991/jop.2000.152.

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In the present investigation eight surface samples collected in a transact from within the forest to open land around Diphu-Lumding areas or Karbi Anglong District (Lat. 25°2' & 26° 1' N: Long. 92°44' & 93°42' E) in Assam were studied with a view to construct pollen spectra from Mikir hills of Assam.
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Sera, S. K. « Early Holocene pollen data from Mikir Hills, Assam, India ». Journal of Palaeosciences 52, no (1-3) (31 décembre 2003) : 121–26. http://dx.doi.org/10.54991/jop.2003.1760.

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The pollen analytical studies of a 1.5 m deep soil profile (12210±110 years BP at 80 cm level) from Kaki Forest Division in Mikir Hills of Assam have been carried out. The pollen investigation of surface samples was made to understand the pollen/vegetation relationship in the forest. However, the study of surface samples does not fully cohere with the present day set up of vegetation. Palynological studies of the sediment profile indicate that since the last 15,000 years there have been three stages of vegetational developments followed by a reducing environment at the beginning (150-120 cm) reflecting directly on brief phases of climate such as arid, semi-arid and warm and humid. The abundance of grasses both cultivated as well as wild throughout the pollen diagram has revealed the existence of an open savanna forest for a long period. The arboreal vegetation is represented by mixed tropical and subtropical trees and shrubs. Both monolete and trilete ferns are well documented in the assemblage. Occurrence of some degraded pollen and spores indicate the biodegradation of microbiota as evidenced by the presence of fungal spores and hyphae in almost all the sediments. The low occurrence of extra regional plant taxa like Pinus, Picea, Abies, Larix, Betula and Alnus in the sediments is indicative of long distance transportation of pollen from high elevation.
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Prakash, U., et P. P. Tripathi. « Fossil woods of Leguminosae and Anacardiaceae from the Tertiary of Assam ». Journal of Palaeosciences 17, no (1-3) (16 juin 2022) : 22–32. http://dx.doi.org/10.54991/jop.1968.535.

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Three fossil woods from the Tertiary of Assam are described here. One, resembling the modern wood of Lannea, is from a road cutting at mile-stone 9 on Dimapur-Diphu road in Mikir Hills, and the others comparable with Adenanthera and Swintonia are from near the town of Hailakandi (24°26'N; 92°32'E) in district Cachar. Recently, these have been briefly described by us (Prakash & Tripathi, 1967, 1968).
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Acharjee, Shukla, Shubhendu Shekhar, D. Majumdar, Neelratan Singh, Y. K. Mawale, Akhilesh Singh et B. K. Iyengar. « The Satellite Derived Digital Elevation Models of Mikir Hills, Karbi Anglong, Assam, India ». Journal of Scientific Research 65, no 03 (2021) : 31–35. http://dx.doi.org/10.37398/jsr.2021.650305.

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Dhurandhar, A. P., U. K. Pandey et Ch Raminaidu. « Petrochemistry and Sr, Nd, Pb Isotopic Characteristics of Basic Dykes of Mikir Hills, Assam ». Journal of the Geological Society of India 94, no 6 (décembre 2019) : 559–72. http://dx.doi.org/10.1007/s12594-019-1361-z.

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Ghosh, Gopal K. « Automatic thrust/fault and edge location with gravity data across the Shillong plateau and Mikir hill complex in northeastern India using the most positive and most negative curvature interpretation ». Journal of Geophysics and Engineering 21, no 1 (2 janvier 2024) : 290–303. http://dx.doi.org/10.1093/jge/gxad101.

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Abstract Northeast India encompasses numerous thrusts, faults, and lineaments with undulated surface topography and is one of the utmost tectonically active regions in the world. Owing to the results of the collision of the Indian Plate under the Tibetan Plate and Burmese Plate, respectively, this area has affected the highest seismic potential zone-V, triggering many earthquakes. The current study area is located in and around the Shillong plateau, Mikir Hills, Naga Hills, Arakan-Yoma fold belt, Bengal basin, and Mishmi hills of the Himalayan foothills and that fall under the northeast of India. The thrusts and faults information available in this area are very scanty due to limited availability of geoscientific data and revealing seismic survey. Henceforth, it is necessary to get enhanced geoscientific learning for a better understanding of thrusts, faults, and lineaments information, the most positive and most negative curvature attribute analyses have been carried out using ground gravity data in this area. The significant derived results from this study encourage supplementary findings of thrust, fault, and lineament information, which also correlate well with the previously found results of 3D Euler deconvolution and source edge detection. Although, gravity data interpretation has its own limitations, however, the current derived results using the latest curvature analysis approach utilizing gravity data show realistic invigorated solutions for a better understanding of the thrust, fault, and lineament locations in this area.
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Tripathi, S. K. M., R. K. Saxena et Vandana Prasad. « Palynological investigation of the tura formation (early eocene) exposed along the tura-dalu road, west Garo Hills, Meghalaya, India ». Journal of Palaeosciences 49, no (1-3) (31 décembre 2000) : 239–52. http://dx.doi.org/10.54991/jop.2000.145.

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The present paper deals with the palynological study of the Tura Formation exposed along the Tura Dalu Road in West Garo Hills, Meghalaya. The recovered palynoflora is represented by dinoflagellate cysts, fungal remains, pteridophytic spores and angiosperm pollen. The assemblage is dominated by angiosperm pollen assignable to the families Arecaceae, Liliaceae, Oleaceae, Bombacaceae, Caesalpiniaceae, Mimosaceae, Unieaceae and Alangiaceae. Three new species of angiosperm pollen viz.. Retitricolpites singhii, Lanagiopollis meghalayaensis and Lanagiopollis subglobosus have been proposed. Pteridophytic spores, which constitute the subdominant clement of the assemblage, are assignable to the families Osmundaceae, Matoniaceae. Polypodiaceae. Sehizaeaceae and Parkeriaceae. Based on the quantitative analysis of the palynoflora, the studied sequence has been divided into three formal palynological assemblage zones. In ascending order, these are: (1) Lanagiopollis spp. Assemblage-zone (2) Palmidites spp. Assemblage-zone and (3) Tricolporopilites spp. Assemblage-zone. A comparison of the present assemblage with other Palaeogene assemblages of India indicates that it correlates well with those known from the upper pan of the Mikir Formation. Nonh Cachar Hills. Assam; the Prang Formation, Jaintia Hills Meghalaya; the Naredi Formation, Kutch; and the Rajpardi Lignite, Gujarat. Since these formations are of Early Eocene age, the studied sequence is also dated as Early Eocene. Most families represented in the assemblage are presently distributed in tropical to subtropical regions. indicating a similar climate during the deposition of Tura sediments. The presence of coastal elements and dinoflagellate cysts in the assemblage is indicative of a littoral depositional environment.
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Baruah, Saurabh, Dipok K. Bora et Rajib Biswas. « Estimation of crustal discontinuities from reflected seismic waves recorded at Shillong and Mikir Hills Plateau, Northeast India ». International Journal of Earth Sciences 100, no 6 (21 mai 2010) : 1283–92. http://dx.doi.org/10.1007/s00531-010-0541-2.

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Biswal, Shantajhara, Kapesa Lokho, Annie Needham, Ansuya Bhandari, Uma Kant Shukla, Kezhakielie Whiso et Kuldeep Prakash. « Record of Additional Middle Eocene Vertebrate Remains from the Mikir Hills, NE India : Implications on Paleoenvironment and Paleobiogeography ». International Journal of Geosciences 13, no 08 (2022) : 609–26. http://dx.doi.org/10.4236/ijg.2022.138033.

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Livres sur le sujet "MIKIR HILLS"

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Bora, Dipok K., et Saurabh Baruah. Crustal Structure in Shillong-Mikir Hills Plateau of NER INDIA : A primary input to the earthquake hazard assessment in Shillong-Mikir Plateau of NER, India. LAP Lambert Academic Publishing, 2012.

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Actes de conférences sur le sujet "MIKIR HILLS"

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Nag, Rahul, Nathan Cogné, Hrushikesh Hari et Prabhakar Naraga. « Late-Cambrian upper amphibolite to granulite-facies metamorphism in the Mikir Hills, Assam-Meghalaya Gneissic Complex (NE India) : P-T history and tectonic implications ». Dans Goldschmidt2023. France : European Association of Geochemistry, 2023. http://dx.doi.org/10.7185/gold2023.20032.

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