Structural Control in The Evolution of Granitic Landforms: A Study of Domes and Tors in Dumka, Jharkhand

By : Sayan Choudhary , V.C. Jha

Page No: 49-59

Abstract
Dumka in Jharkhand is an area of subtropical monsoonal climate. It possesses wide range of granitic landforms including domes and tors. Aside from domed structure, Dumka is also characterised by the presence of boulder-strewn domes and castellated domes. Granites are of two lithological groups: one is unclassified granite gneiss with enclaves of metamorphics and the other one is Garnet Biotite Gneiss. Both this variants belong to the supergroup of Chotanagpur Granite Gneiss Complex and the age range from Archaen to Proterozoic. In spite of the uniform climatic characteristics throughout Dumka, granitic landforms show great diversity in terms of morphology. Hence, it is concluded that the prime control of the granitic landforms of Dumka is litho-structural.

Author :
Sayan Choudhary : Directorate of Open and Distance Learning, University of Kalyani, Kalyani – 741235, Nadia, West Bengal.
V.C. Jha : Department of Geography, Visva Bharati, Santiniketan – 731235, Birbhum, West Bengal.
 

DOI: https://doi.org/10.32381/ATNAGI.2020.40.01.4