Discovery of stromatolites from the neoproterozoic blaini cap carbonate, Jantawalgaon, Bhimtal area, Uttrakhand, India
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Abstract
The present contribution deals with the discovery of stromatolites from the Blaini cap carbonate of the Nanital area from a locality which is called Jantawalgaon. The limestone horizon from which the stromatolite has been reported has a disputed stratigraphic position and therefore a detailed study helped in properly placing the unit where it belonged. This study includes detailed sedimentological analysis, facies analysis and sequence stratigraphic analysis which helped in properly positioning the litho-unit. The association of calcareous nodules and micro faults along with petrographic study provided the depositional environment for the Jantawalgaon limestone unit. Earlier this unit was placed within the Jaunsar Group but the present study suggests that this litho unit belongs to the Blaini Formation of the Krol Belt.
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References
Auden, J. B., (1937). Structure of Himalaya in Garhwal. Rec. Geol. Surv. Ind., 71(4): pp. 407-433
Das, B., Joshi, M., Patel, S. & Kumar, A. (2021). Tectonometamorphic evolution of the Nappes and Klippes of the NW Lesser Himalaya India: A review. Ind. Jour. Geoscience, 75(4): 277-295.
Fuchs, G.R. & Sinha, A.K. (1978). The tectonics of the Garhwal Kumaun Lesser Himalaya; Sond. Jahrb. Geol., 121: 219-241
Heim, A. & Gansser, A. (1939). Central Himalaya, geological observation of the Swiss Expedition 1936; Hindustan Publication Corporation (India), Delhi, 1975 edn, Mem. Soc. Helv. Sci. Nat., 73: 1-245.
Heim, A. & Gansser, A. (1939). Central Himalaya: Geological observations of Swiss expedition 1936; Reprinted Delhi Hind. Publ. Co., 246.
Mandal, Sabyasachi & Choudhuri, Adrita & Mondal, Indrani & Sarkar, Subir & Chakraborty, Partha & Banerjee, Santanu. (2019). Revisiting the boundary between the Lower and Upper Vindhyan, Son valley, India. J. Earth System Sci., 128: 10.1007/s12040-019-1250-2.
Mandal, Subhadip & Robinson, Delores & Kohn, Matthew & Khanal, Subodha & Das, Oindrila & Bose, Sukhanjan (2016). Zircon U-Pb ages and Hf isotopes of the Askot klippe, Kumaun, northwest India: Implications for Paleoproterozoic tectonics, basin evolution and associated metallogeny of the northern Indian cratonic margin. Tectonics, 34: 10.1002/2015TC004064.
Merh, S.S. (1977). Structural studies in the parts of Kumaun Himalaya; Himalayan Geol., 7: 26-42
Pant, C.C. & Shukla, U.K. (1999). Nagthat Formation: An example of a progradational, tide dominated Proterozoic succession in Kumaun Lesser Himalaya, India. J. Asian Earth Sci., 17(3): 353-368.
Rupke, J. & Sharma, R. (1974). Stratigraphic and structural evolution of the Kumaun Lesser Himalaya. Sediment. Geol., 1.
Shah, O.K. & Merh, S.S. (1978). Structural geology and stratigraphy of Bhimtal-Bhowali area in Kumaun Himalaya-A reinterpretation. J. Geol. Soc. India, 19: 91-105.
Singh, I.B. & Rai, V. (1983). Fauna and biogenic structures in Krol-Tal succession (Vendian-Ealry Cambrian), Lesser Himalaya: their biostaratigraphic and palaeoecological significance. J. Palaentological Society of India, 28: 67-90.
Srikantia, S.V. & Bhargava, O.N. (1974). The Salkhala and Jutogh Relationship in the Kashmir and Himachal Himalaya-A Reappraisal. Himalayan Geology, 4: 396-413.
Valdiya, K.S. (1980). The two intracrustal boundary thrusts of the Himalaya. Tectonophysics, 66: 323-348.
Valdiya, K.S. (1988). Geology and natural environment of the Nainital Hills, Kumaun Himalaya, 155p.
Valdiya, K.S. & Cronin, V.S. (1988). Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences Vol. 326, No. 1589, Tectonic Evolution of the Himalayas and Tibet, pp. 151-175.