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The rich Quaternary history of the Pacific Northwest showcases the important linkages between multiple geologic processes that have shaped its sedimentology and geomorphology. This field trip in eastern Washington explores the evolution of landforms that developed within the Palouse and the Channeled Scabland—geomorphically distinctive areas that were indirectly and directly influenced by multiple Quaternary glacial outburst megafloods. These floods produced expansive fine-grained sediments that were subsequently remobilized by the wind to generate sand dunes, sand sheets, and the thick loess of the Palouse. Landforms and deposits that date from the Last Glacial Maximum (LGM) include dramatically eroded scab-land features,...

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