(Update November 29 2012: See my new post on the geology I saw on this trek!).
Yes.. I know Geology Map Day was last week, but although late, I have put up this map and a schematic cross section... I'm leaving on a hiking trip to the Kumaon Himalayas and have been reading up on the geology of the area. After many years of being confused about the stratigraphy and structure, I finally got some clarity on Lesser Himalayan geology reading some recent work. The paper that helped me most was:
The Kumaun and Garwhal Lesser Himalaya, India: Part 1. Structure and stratigraphy- Julian Celerier et. al. 2009 GSA Bulletin
and its companion paper
The Kumaun and Garwhal Lesser Himalaya, India. Part 2: Thermal and deformation histories
Two other papers also were quite useful:
1) Patel, R.C. and Carter, Andrew (2009) Exhumation history of the Higher Himalayan Crystalline along Dhauliganga-Goriganga river valleys, NW India: new constraints from fission track analysis. Tectonics 28
2) Revisiting Central crystallines in Pindar and Ramganga valleys, Kumaon Hills,Uttarakhand – an expedition based case study - Geological Survey of India Mapping Report. The report describes the lithologies very near my trek route along the Ramganga river sourced from the Namik glacier, near the village of Namik.
Base camp for the trek is going to be a campsite on a ridge across the small village of Tejam. Looking at geological maps I found out that I am going to be in the Lesser Himalayas, but very just south of the Main Central Thrust which structurally juxtaposes the Greater or High Himalayas over the Lesser Himalayas. The first paper I mentioned by Celerier et.al. explains quite well the stratigraphic and structural evolution of the Lesser Himalayas.
A quick recap: