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| Titel |
Weathering, Soil Depth and Erosion in the San Gabriel Mountains: The Tectonic Signature on Chemical Weathering |
| VerfasserIn |
Jean Dixon, Tony Hartshorn, Arjun Heimsath |
| Konferenz |
EGU General Assembly 2010
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 12 (2010) |
| Datensatznummer |
250039726
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| Zusammenfassung |
| It is broadly understood that external forcings, such as climate and tectonics, influence the
pace and pattern of landscape evolution by their control on physical and chemical processes
that move soil and dissolve bedrock. Recent work in the Sierra Nevada quantified the
potential role of climate in controlling chemical weathering rates, and suggested that strong
erosion-weathering feedbacks control the landscape’s response. Here, we explore the tectonic
signature on weathering in the San Gabriel Mountains (SGM), using bulk elemental analyses
of soils and bedrock and cosmogenic 10Be derived rates of soil production. The
SGM are located along a restraining bend in the San Andreas Fault, resulting in
tectonic forcing on erosion and relief. We quantified chemical weathering across this
landscape using six sites that bracket the low-gradient hillslopes of the stable upland
plateau and the transient hillslopes at the margins of the incising landscape. On
low gradient hillslopes ( |
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