| Summary: | The present study has been carried out with special emphasis on the spatial and temporal variability of sedimentary architecture along the strike length of North Almora Thrust (NAT). Here, we investigated fluvial terraces along Saryu, Jaigan, Kosi, Gagas, and Ramganga rivers in NAT zone of Central Kumaun Himalaya. The sedimentary sequences (fluvial terraces) of these river valleys are analyzed to explain the response of tectonic activity during the late Quaternary. The NAT zone has preserved debris flow terraces, bedrock strath terraces, and fluvio-lacustrine terraces that provide signatures of tectonic activity during the late Quaternary and Holocene time. The optical chronology of fluvial sediment dated from the river valleys suggests multiple phase of fluvial aggradation in NAT zone between 38 and 3 ka. The detailed analysis shows the deposition of Gcm, Gmg, Gmm, Fl, Fsm, Sm and Sp sedimentary facies corresponding to the fluvial environment. The clast rich breccia is commonly associated with either tectonically or transport from adjacent mountain slope and associated as debris flow due to landslides is possibly associated with tectonic activity.
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