Polyphase Deformation of Ajabgarh Stage Rocks, Delhi Group, Around Narnaul, Mohindergarh District, Haryana, India

Authors

  • Anand Mohan Bhola
     Department of Geology, University of Delhi, Delhi 110007
  • S. Varadarajan
     Department of Geology, University of Delhi, Delhi 110007

Abstract

A detailed study and analysis of all the planar and linear elements in the lithic units of the area, in both meso and macro scale reveal that they bear the impress of three phases of folding, F1 F2 and F3. The most dominant phase is the second phase resulting in open asymmetric folding with high wave length/amplitude which express in mesoscale crenulations on the planar surface of F1 folding. The F1 phase is responsible for the regional foliation S1 which is parallel to lithic banding S0. The tight isoclinal folds develop appressed surface which act as form-surface of F2. The F1 and F2 are generally co-axial. The last phase of folding F3appear as broad open cross-folds broadly warping the pre-existing foliation. This phase can distinctly be observed on map scale.

Distinction between each phase and the associated structures is based on the overprinting relations, in particular the bending of axial surface foliation and other interference patterns between the existing phases. Structural analysis of the area indicates operation of a predominantly sub-horizontal NW-SE oriented stress.

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Issue

Volume 22, Issue 4, April 1981

Section

Research Papers

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Published

1981-04-01

How to Cite

Bhola, A. M., & Varadarajan, S. (1981). Polyphase Deformation of Ajabgarh Stage Rocks, Delhi Group, Around Narnaul, Mohindergarh District, Haryana, India. Journal of Geological Society of India, 22(4), 153–163. Retrieved from https://geosocindia.com/index.php/jgsi/article/view/64915

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