Figure 1. Simplified geological map of a part of the NW Himalayas, showing lithotectonic zones and longitudinally continuous thrusts. The focus of the present study is Nahan salient. Inset shows location of the study area vis-à-vis the Himalayan mountain belt. Note that in all the figures the same colour scheme has been maintained; i.e., the LHZ, Subathu-Dharamsala and Siwalik rocks are shown with various shades of green, blue, and yellow, respectively.