Holocene depositional history inferred from single-grain luminescence ages in southern California, North America
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Abstract
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.
Study Area
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Holocene depositional history inferred from single-grain luminescence ages in southern California, North America |
| Series title | Geophysical Research Letters |
| DOI | 10.1029/2021GL092774 |
| Volume | 48 |
| Issue | 15 |
| Year Published | 2021 |
| Language | English |
| Publisher | American Geophysical Union |
| Contributing office(s) | Earthquake Science Center |
| Description | e2021GL092774, 12 p. |
| Country | United States |
| State | California |
| Other Geospatial | southern California |
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