Tectono-lithostratigraphy of the outer Lesser Himalaya in the Barahakshetra-Tribeni area, Arun valley section, eastern Nepal

Geological mapping was carried out in the outer part of Lesser Himalaya Barahakshetra – Tribeni area east Nepal along Arun River valley. A revised and updated tectono-lithostratigraphic scheme with detailed description each unit their comparison central west has been presented this work. The is divided into three tectonic units named as Chimra Thrust Sheet, Dharapani Sheet Paraautochthon from north to south, respectively, separated by Thrust. rocks consist Pre-Cambrian Phongsawa Group Mulghat Formation, Okhre Jyamire Gneiss Belhara bottom top, respectively. comparable Ulleri Augen other formations are equivalent lower Kuncha Formation. comprising Bhendetar Group, subdivided Chiuribas Sangure Quartzite Karkichhap upper Fagfog Dandagaon Phyllite, Late Lukuwa Dolomite unconformably overlain Gondwana post-Gondwana Group. Kokaha Diamictite Baraha Volcanics, Sapt Koshi Formation Tamrang Sisne Taltung Dumri