2007 GSA Denver Annual Meeting (2831 October 2007)
Wednesday, 24 October 2007
8:00 AM-5:00 PM, Hampton Inn, Grand Junction, CO:

402. River Incision Histories of the Black Canyon of the Gunnison and Unaweep Canyon: Interplay between Late Cenozoic Tectonism, Climate Change, and Drainage Integration in the Western Rocky Mountains

Primary Leader: Andres Aslan
Leader(s): Karl Karlstrom
Field Trip Description: Trip Description: Canyons of the Upper Colorado and Gunnison River systems provide a spectacular backdrop for discussing the interplay between late Cenozoic tectonism, climate change, and base level shifts related to drainage integration. Examination of ancient river gravels, lacustrine deposits, dated volcanic sediments (basalts, Lava Creek B ash), and canyon geometries will be used to discuss rates and patterns of late Cenozoic fluvial incision, and the effects of incision on landscape development. Key questions that will be addressed include: 1) to what degree have glacial-interglacial cycles affected landscape development?, 2) is stream piracy, related to drainage integration, a primary driver of incision, and 3) are the central Rockies still rising and if so, what are the neotectonic indications and responses?
Field Trip will span: 3 days
Sponsor(s): Quaternary Geology & Geomorphology Division

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