Columbia River Basalt Group
eastbound on Interstate 90
glacial lake outburst floods
- Columbia River Basalt Group Stretches from Oregon to Idaho (usgs.gov)
The thick, layered lava flows of the CRBG erupted as flood basalts, which originate as some of the most highly effusive eruptions in the world. The CRBG sequence a classic example of flood basalt activity that erupted more than 350 lava flows from about 16.7 Ma to 5.5 Ma. The eruptions originated from a series of generally north-northwest-trending linear fissures, ranging from tens to hundreds of kilometers in length, located along the Washington/Oregon/Idaho border. The magma that fed these massive eruptions may have come from a plume-like upwelling from the mantle called a hot spot. Since the time of the CRBG eruptions, the North American plate has moved in a west-southwestwardly motion, and that hot spot is now believed to reside beneath Yellowstone volcano in northwest Wyoming.
- Northwest Waterfall Survey
The Pacific Northwest is home to more Waterfalls than anywhere else in North America. The Northwest Waterfall Survey was founded in order to create a thorough inventory of these outstanding natural features.
- Idaho (Wikipedia)
Idaho (/ˈaɪdəhoʊ/ EYE-də-hoh) is a state in the Pacific Northwest region of the Western United States. To the north, it shares a small portion of the Canada–United States border with the province of British Columbia. It borders the states of Montana and Wyoming to the east, Nevada and Utah to the south, and Washington and Oregon to the west. The state’s capital and largest city is Boise. With an area of 83,570 square miles (216,400 km2), Idaho is the 14th largest state by land area, but with a population of approximately 1.8 million, it ranks as the 13th least populous and the 7th least densely populated of the 50 U.S. states.
- Idaho (en.wikiquote.org)
Idaho is a state in the northwestern region of the United States. Idaho is the 14th largest, the 13th least populous, and the 7th least densely populated of the 50 United States. The state’s largest city and capital is Boise. Residents are called “Idahoans”. Idaho was admitted to the Union on July 3, 1890, as the 43rd state. Idaho is a mountainous state with an area larger than that of all of New England. It borders the US states of Montana to the northeast, Wyoming to the east, Nevada and Utah to the south, and Washington and Oregon to the west. To the north, it shares a 45 mi (72 km) international border with the Canadian province of British Columbia, the shortest such land border of any state.
- Idaho (en.wikivoyage.org)
Idaho is a state in the Rocky Mountains of the United States. Idaho is known for its wilderness; there are snow-capped mountains that reach 10,000 to 12,500 feet (3,000 to 3,800 m) above sea level. One of the whitewater rivers runs through the country’s deepest river canyon. Most of the land north of Boise is national forest or state forest.
