Cover Image Credits

Early-Miocene to Late-Quaternary evolutionary model of the drainage system in the eastern syntaxis area (modified from Lang and Huntington, 2014) constructed using provenance analysis from this study, Lang and Huntington (2014), Clark and others (2004), Robinson and others (2014), and references therein. A Yarlung-Brahmaputra connection existed since at least the Late Miocene (B). The question mark and the dotted drainage line indicates a potential paleo-drainage scenario in which the Yarlung-Brahmaputra connection existed through the Siang River since the Early Miocene, but other scenarios are possible such as a Yarlung-Brahmaputra connection through the Lohit River (A). Capture of the Parlung River by the Siang occurred in the Late Quaternary (C). The arrows symbolize the northward growth of the antiformal Namche Barwa syntaxis. Abbreviations are: ES – Eastern Syntaxis, MFT – Main Frontal Thrust, MCT – Main Central Thrust, MBT – Main Boundary Thrust, STD – South Tibetan Detachment and IYSZ - Indus-Yarlung Suture Zone. Red star labeled SRS represents the location of the studied Sibo, Remi, and Siang Siwalik sections on which the paper by Govin and others (p. 764–798, this issue) is based. Photograph of Dr. Gwladys Govin sampling in the Siwalik foothills of the Himalaya. Gwladys died in a car accident shortly after she submitted this paper to the American Journal of Science. Her co-authors honor her legacy.