| 12:15 PM-6:00 PM, Colorado Convention Center: |
421. Late Quaternary through Holocene Landscape Evolution of the White River Badlands, South Dakota - CANCELLED
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| Primary Leader: Patrick Burkhart |
| Leader(s): Rachel Benton, Michael Jahn, J. Elmo Rawling III, III, Jack Livingston |
| Field Trip Description: Badlands are common arid and semi-arid landscapes long recognized in slope development and erosion rate studies by preeminent geomorphologists including Gilbert, Davis and Schumm. This trip will examine in detail Quaternary strata and landscape evolution in arguably the most famous badlands, the White River (WR) Badlands of South Dakota, which were pivotal during the development of vertebrate paleontology in North America. Geologists have collected fossils from the WR Group there nearly every field season since the mid-1800’s, however until recently little work described the extensively exposed Quaternary strata. The WR Badlands are also a proposed dust source for the widespread Peoria Loess of the Central Great Plains. The research highlighted on this trip includes (1) luminescence and radiocarbon ages from late Pleistocene thru Holocene eolian sand, (2) radiocarbon ages from Holocene eolian cliff-top deposits, ( 3) luminescence ages from late Pleistocene fluvial silts, ( 4) radiocarbon ages of late Holocene fluvial silts, and (5) cosmogenic ages on ventifacts from modern pediments. These new works will facilitate discussions including (1) late Quaternary paleoenvironments, (2) late Quaternary fluvial incision rates, (3) up-wind sediment supply of late Quaternary nonglaciogenic loess, and (4) landscape evolution spanning late Pleistocene tableland through late Holocene sod table development, and 5) modern erosion and pedimentation rates. |
| Field Trip will span: 3 days |
| Sponsor(s): |