Structural Geology and Stratigraphy of Bhimtal-Bhowali Area in Kumaon Himalaya - A Reinterpretation

An early NW-SE trending anticlinal structure in quartzites is distorted by the super-imposition of late E-W flexures, perhaps generated during late Krol Thrust movement. The N-S to NNE-SSW flexures and N-S transverse faults comprise the last deformational event. The occurrence of any thrust at Ramgarh is ruled out as it is found that the so called 'porphyries' of Ramgarh extend Southward uninterruptedly up to Ranibaug, These porphyries are keratophyric and genetically related to the spilites of Bhimtal-Bhowali area. The supposed Nagthat quartzite-slate sequence above spilites is more likely to be equivalent to Blaini. This sequence together with spilite and keratophyric rocks comprises the lower portion of the Krol Group. The spilites represent the geo-synclinal volcanism in a shallow basin, which was followed by the deposition of Blaini, Infra-Krol and Krol.