This document provides information about the Siwaliks exposed in the Arun-Tamar region of Nepal. It discusses the stratigraphy, structures, geomorphology, and conclusions about the Siwalik formation in the region. The Siwalik is divided into lower, middle, and upper formations composed of sandstone, mudstone, and conglomerate. The structures include anticlines, synclines, and imbricated faults. Geomorphological features include alluvial fans, badlands, and thin soil cover influenced by the underlying geology. In conclusions, the document states that the Siwalik rocks are similar to other areas in Nepal and indicate a shallow nature of deformation.