Geosciences and Environmental Change Science Center
July 20, 2016
Fluvial system response to late Pleistocene-Holocene sea-level change on Santa Rosa Island, Channel Islands National Park, California
By Randy Schumann (GECSC), Jeff Pigati (GECSC), and Jack McGeehin. Published in Geomorphology.
Alluvial deposits on Santa Rosa Island record responses to more than 100 meters change in sea level from the most recent glacial to our modern interglacial period. Alluvium initially accumulated on the exposed marine shelf, then sedimentation progressed upstream. Driven by rising sea level, the valleys eventually accumulated as much as 14 m of fine-grained sediment, which have since been incised to form deep arroyos.
July 15, 2016
The GECSC's Sources, compositions, and effects of atmospheric dust from American Drylands Project presents the Dust Event Detection Website. The project maintains a catalog of satellite imagery that captures dust-emission events in the western United States, and this new website makes that information accessible. Although the catalog has broad applicability, it primarily complements ongoing work focusing on the effects of dust deposited on mountain snow cover.
July 12, 2016
Geologic map of the Murray quadrangle, Newton County, Arkansas
By Mark Hudson and Kenzie Turner. USGS Scientific Investigations Map 3360.
Created in cooperation with the National Park Service, this map summarizes the stratigraphy and structural geology of the Murray quadrangle in the Ozark Plateaus region of northern Arkansas that includes a portion of Buffalo National River. Included with the 1:24,000-scale map are supporting GIS files.
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