Datasets / Sprague River Oregon Geomorphology


Sprague River Oregon Geomorphology

Published By U.S. Geological Survey, Department of the Interior

Issued over 9 years ago

US
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Summary

Type of release
ongoing release of a series of related datasets

Data Licence
Not Applicable

Content Licence
Creative Commons CCZero

Verification
automatically awarded

Description

Geomorphic mapping establishes the basic context for understanding modern channel conditions by (1) defining major elements of the late Cenozoic geologic history shaping the geomorphology of the study area; and (2) outlining the active geomorphic floodplain, which is the domain for assessing channel change and floodplain vegetation conditions. The mapping domain broadly corresponds with the extent of Light Detection and Ranging (LiDAR) topography acquired in November, 2004 (Watershed Sciences, 2005) and includes the broad alluvial valleys of the lower Sycan River, mainstem Sprague River, and lower North Fork of the Sprague River. The mapping encompasses the main floodplains and contiguous alluvial and colluvial landforms. The geomorphic mapping was based on aerial photographs, LiDAR topography acquired in November 2004 (Watershed Sciences, 2005), U.S. Geological Survey 7.5-minute topographic maps, existing soil mapping (Cahoon, 1985), prior geologic mapping (primarily Sherrod and Pickthorn, 1992), reconnaissance field observations, and stratigraphic sections, primarily along bank exposures but supplemented by augering.