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Holocene depositional history inferred from single-grain luminescence ages in southern California, North America

June 16, 2021

Significant sediment flux and deposition in a sedimentary system are influenced by climate changes, tectonics, lithology, and the sedimentary system's internal dynamics. Identifying the timing of depositional periods from stratigraphic records is a first step to critically evaluate the controls of sediment flux and deposition. Here, we show that ages of single-grain K-feldspar luminescence subpopulations may provide information on the timing of previous major depositional periods. We analyzed 754 K-feldspar single-grains from 17 samples from the surface to ∼9 m-depth in a trench located downstream of the Mission Creek catchment. Single-grain luminescence subpopulation ages significantly overlap at least eight times since ∼12.0 ka indicating a common depositional history. These depositional periods correspond reasonably well with the Holocene intervals of wetter than average climate conditions based on hydroclimatic proxies from nearby locations. Our findings imply a first-order climatic control on sediment depositional history in southern California on a millennial timescale.

Citation Information

Publication Year 2021
Title Holocene depositional history inferred from single-grain luminescence ages in southern California, North America
DOI 10.1029/2021GL092774
Authors Sourav Saha, Seulgi Moon, Nathan D. Brown, Edward J. Rhodes, Katherine Scharer, Devin McPhillips, Sally F. McGill, Bryan A. Castillo
Publication Type Article
Publication Subtype Journal Article
Series Title Geophysical Research Letters
Index ID 70223330
Record Source USGS Publications Warehouse
USGS Organization Earthquake Science Center