Dr Valdiya has made notable contribution to Himalayan Geology through a sustained and comprehensive study of the Kumaun Himalaya. He has done pioneering work on algal stromatolites in the Lesser Himalaya leading to the fixation of the age of an important rock formation. He has also carried out systematic investigation of the economically rich magnesite deposits and lithological and paleocurrent study of its flysch sediments. He has done significant work on tectonic synthesis and evolutionary history of this part of the Himalayas.