Evidence of ductile shearing from the extensional crenulation cleavage: An example from Zawar area, the Aravalli mountain

Abstract

Extensional crenulation cleavage marked by asymmetric kinks and ductile shears occurs at low angle to steep S-1 planes in the mica schist of Zawar area in the Aravalli mountain. It is developed due to extension along the S-1 planes consequent to large-scale ductile shearing. The compressive stress of such shearing is deduced to be subhorizontal in NNE-SSW direction. Early fold axes assume variable trend due to shearing.