Journal of Geological Society of India (Online archive from Vol 1 to Vol 78)

Moulishree Joshi ¹, Girish CH. Kothyari ¹, P. D. Pant ¹

Affiliations
1 Department of Geology, Kumaun University, Nainital - 263 002, Uttaranchal, IN

Abstract

Morphometric parameters such as drainage, sinuosity character, gradient index (GI), Pseudo Hypsometric Integral (PSI), and longitudinal profile of the Satluj River and its tributary the Ali Khad have helped in delineating the NNW-SSE trending Ali Khad fault. Movements along this fault are manifest in the development of unpaired terraces, triangular fault facets, deep gorges and fault breccias. Normal faulting has been observed in the Quaternary sediments which reflect recent movements. Digital Elevation Model is proposed.

Keywords

Neotectonics, Digital Elevation Model, Bilaspur, Lesser Himalaya.

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B. S. Kotlia ¹, K. Nakayama ², M. S. Bhalla ³, B. Phartiyal ¹, T. Kosaka ⁴, Moulishree Joshi ¹, Jaishri Sanwal ¹, R. N. Pande ¹

Affiliations
1 Department of Geology, Kumaun University, Nainital - 263002, IN
2 Department of Geosciences, Shimane University, Matsue - 690-8504, JP
3 National Geophysical Research Institute, Hyderabad - 500007, IN
4 Department of Geology, Shinshu University, Matsurnoto - 390-8621, JP

Abstract

A 2600 m thick succession, exposed between Kathgodam and Ranibagh in the Kumaun Himalaya and belonging to the Lower and Middle Siwalik, was subjected to lithological and palaeomagnetic studies. Lithologically, four units are recognized in the sequence. Units 1-2 are correlated with the upper part of the Lower Siwalik, whereas the Units 3-4 are correlated with the Middle Siwalik. In the absence of the vertebrate fossils and absolute chronology, the lithological boundaries are used to explain the magnetic polarity stratigraphy. We suggest that the lithological boundary between the Lower and Middle Siwalik (e.g., Chinji-Nagri) in the Kathgodam-Ranibagh section lies at ca. 850 m level and is palaeomagnetically estimated as ca. 9.8 Ma. If such a correlation is correct, the section ranges in age from Chron 5 An to Chron 2 Ar (ca. 12.0 to 4.0 Ma).

Keywords

Siwalik, Lithology, Palaeomagnetic Chronology, Kumaun Himalaya.

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