Angelo Coast Range Reserve

12 Dec, 02 PM - 14 Dec, 05 AM

We seek to use cosmogenic nuclide concentrations accumulated in debris flow material to determine hillslope scale erosion rates. Two small, completely preserved fans built on a strath terrace of the South Fork Eel River in northern California provide an opportunity to test this technique. The debris flows, likely induced by deep-seated landsliding, are preserved in the fans as episodic mass flow events with interlaced transient, fluvial activity. Material for cosmogenic nuclide analysis was collected in profiles from prescribed depth intervals at the upper and lower limits of the fan. These rates will be evaluated by volumetrically determined erosion rates based on carbon dating. We intend to sample some soil from the hillslope source of the debris flow. We also intend to measure total inventories of meteoric-derived Beryllium-10 in fan deposits and terrace deposits for comparison with OSL and Carbon-14 dated material to determine whether meteoric Beryllium-10 is mobile in the sediment or has a possibility to be used as a chronometer for certain materials.

Visit #16623 @Angelo Coast Range Reserve

Approved

Under Project # 10795 | Research

Terrace and fan dating using Beryllium-10

research_scientist - University of Hannover

Reservation Members(s)

Jane Willenbring Dec 12 - 14, 2008 (3 days)
Jane Willenbring Dec 12 - 14, 2008 (3 days)

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