Geology of Washington (state)

ancient river bed in the U.S. state of Washington

waterfall

barren, relatively soil-free landscape in eastern Washington, USA

floods dating from the end of the last ice age, in the USA

plate boundary

major ice sheet that periodically covered large parts of North America during glacial periods over the last ~2.6 million years

divergent plate boundary off the coast of the Pacific Northwest region of North America.

waterfall on the Palouse River in Washington, USA

large water gap of the Columbia River through basalt anticlines in the U.S. state of Washington