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Sedimentology and Geomorphology of Quaternary Alluvial Fans with Implications to Growth Strata, Lost River Range, Idaho: Author: Patterson, Scott Joseph; Date: 2006-08-15; Program: Earth Sciences; Abstract: Small-radius (<2 km), steep (8-17°), Holocene debris flow dominant alluvial fans are depositing on top of large-radius (~5 km), shallow (2-3°) inactive Pleistocene sheetflood dominant alluvial fans along the western flank of the Lost River Range, Idaho. Channel ways, with and without backfilling, have developed within the large sheetflood dominant alluvial fans. The sheetflood dominant alluvial fans are being dissected. Three wedge shaped gravel packages were identified by field mapping and measured sections in four alluvial fans along the active extensional Lost River...; Download File | View full details