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The Columbia is one of North America's largest rivers, and one of two rivers to cut through the Cascades (the Klamath River in southern Oregon is the other). About 15,000 years ago, the Columbia repeatedly flooded much of Oregon during the Missoula Floods ; the modern fertility of the Willamette Valley is largely the result.
Oregon (/ ˈ ɒr ɪ ɡ ən,-ɡ ɒ n / ⓘ ORR-ih-ghən, -gon) [7] [8] is a state in the Pacific Northwest region of the United States. It is a part of the Western U.S., with the Columbia River delineating much of Oregon's northern boundary with Washington, while the Snake River delineates much of its eastern boundary with Idaho.
The following is a list of sovereign countries and dependent territories in North America, a continent that covers the landmass north of the Colombia-Panama border as well as the islands of the Caribbean.
An enlargeable map of the 36 counties of the state of Oregon. The 36 counties of the state of Oregon. Cities in Oregon. State capital of Oregon: Salem; Largest city in Oregon: Portland (23rd most populous city in the United States as of July 2006. [4]) City nicknames in Oregon; Unincorporated communities in Oregon; Census-designated places in ...
A map of North America's physical, political, and population characteristics as of 2018. North America is a continent [b] in the Northern and Western Hemispheres. [c] North America is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South America and the Caribbean Sea, and to the west and south by the Pacific Ocean.
Rank Country Highest point Elevation 23 Antigua and Barbuda Boggy Peak [1]: 402 m (1,319 ft) 25 Bahamas Mount Alvernia [2]: 63 m (207 ft) 24 Barbados Mount Hillaby [3]: 340 m (1,115 ft)
Age of the bedrock underlying North America, from red (oldest) to blue, green, yellow (newest). Seventy percent of North America is underlain by the Laurentia craton, [5] which is exposed as the Canadian Shield in much of central and eastern Canada around the Hudson Bay, and as far south as the U.S. states of Michigan, Wisconsin, and Minnesota.
Below is a list of countries and dependencies in North America by area. [1] The region includes Canada, the Caribbean, Saint Pierre and Miquelon, Central America, Greenland, Mexico, and the United States. Canada is the largest country in North America and the Western Hemisphere.