Geomorphology and Flood-Plain Vegetation of the Sprague and Lower Sycan Rivers, Klamath Basin, Oregon

Figure 7. Pumiceous sand deposits of the approximately 7,700 calendar year before present Sycan flood within the lower Sycan River valley segment. A. Photograph of exposure at site 7/2/05-1 at Sycan flood-plain kilometer 10.1 (2 July 2005). B. Photograph of Sycan flood deposits overlying silt and clay wet flood-plain deposits at site 9/12/06-2 at Sycan flood-plain kilometer 6.1 (20 June 2006)

Contents:

• Summary and Significant Findings
• Introduction
• The Sprague River Basin
• Study Area, Methods and Data Sources
• Geomorphic Mapping and Geologic History
• Valley Segments
• Channel and Flood-Plain Conditions and Processes
• Flood-Plain and Riparian Vegetation
• Implications for Restoration and Monitoring
• References Cited
• Location Map
• Plate
• Study Description and Links to Map Data

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