Early to Middle Holocene Coastal Dune and Estuarine Deposition, Santa Maria Valley, California

Late Quaternary deposition in many terrestrial basins along the California coast consists of interbedded fluvial, estuarine, and dune facies deposited in response to relative sea level changes. Radiocarbon dating of sediments retrieved from boreholes drilled through the Guadalupe dune sheet at the m...

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Bibliographic Details
Published in:Physical geography 2006-04, Vol.27 (2), p.127-136
Main Authors: Knott, Jeffrey R., Eley, Donald S.
Format: Article
Language:English
Subjects:
America
Bgi / Prodig
California
coastal dunes
Holocene
Physical geography
Santa Maria River
sea-level change
United States of America
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Summary:Late Quaternary deposition in many terrestrial basins along the California coast consists of interbedded fluvial, estuarine, and dune facies deposited in response to relative sea level changes. Radiocarbon dating of sediments retrieved from boreholes drilled through the Guadalupe dune sheet at the mouth of the Santa Maria River, where uplift rates are zero or less, indicate that estuarine deposition began locally around 9-11 ka in response to rising sea level. The estuarine deposits were then buried by dune sands around 3.5-4.3 ka, perhaps in response to sea-level regression during mid-Holocene (~4.5 ka) glaciation and not the earlier glacial periods, as previously inferred by others.
ISSN:0272-3646
1930-0557
DOI:10.2747/0272-3646.27.2.127