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Estimating erosion rates on active bedrock channels using in situ produced 10Be: implications for landscape evolution in small transient rivers.
Stockholm University, Faculty of Science, Department of Physical Geography and Quaternary Geology.
2010 (English)In: Geological Society of America Abstract with Programs, 178678. Denver, USA, Oct-Nov 2010., 2010Conference paper (Other academic)
Abstract [en]

We measured concentrations of 10Be in two small bedrock rivers catchments on the Isle of Jura (western Scotland) in order to obtain erosion rates to test models of the responses of small bedrock rivers to base-level fall. The rivers of Jura experienced an abrupt, glacioisostatic base-level fall ca. 13.5ka, triggering upstream-propagating knickpoints. 10Be concentrations were obtained in the channel bed upstream and downstream of the main knickpoint triggered by that base-level fall. The preliminary results indicate that erosion rates are slightly higher downstream of the knickpoints, reflecting incomplete accommodation of the base-level fall by knickpoint retreat, ongoing glacioisostatic uplift and/or knickpoint rotation.

Place, publisher, year, edition, pages
, Geological Society of America Abstracts with Programs, Vol. 42, No. 5, p. 179
National Category
Physical Geography
Research subject
Geography, Physical Geography
URN: urn:nbn:se:su:diva-54240OAI: diva2:392411
Geological Society of America Denver Annual Meeting
Available from: 2011-01-26 Created: 2011-01-26 Last updated: 2012-11-17

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Jansen, John
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