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100th meridian west: Map


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The meridian 100° west of Greenwich is a line of longitude that extends from the North Polemarker across the Arctic Oceanmarker, North America, the Pacific Oceanmarker, the Southern Oceanmarker, and Antarcticamarker to the South Polemarker.

The 100th meridian west forms a great circle with the 80th meridian east.


Starting at the North Polemarker and heading south to the South Polemarker, the 100th meridian west passes through:

{| class="wikitable"

United States

In the United Statesmarker the meridian 100° west of Greenwich forms the eastern border of the Texas panhandlemarker with Oklahomamarker (which traces its origin to the Adams-Onís Treaty in 1819 which settled the border between New Spain and the United States between the Red Rivermarker and Arkansas Rivermarker).

In the central Great Plainsmarker, the meridian roughly marks the western boundary of the normal reach of moist air from the Gulf of Mexicomarker, and the approximate boundary (although some areas do push the boundary slightly farther east) between the semi-arid climate to the west and the humid continental (north of about 37°N) and humid subtropical (south of about 37°N) climates to the east.The type of agriculturewest of the meridian typically relies heavily on irrigation. Historically the meridian has often been taken as a rough boundary between the eastern and western United States. White settlement, spreading westward after the American Civil War, encroached in the meridian in the 1870s.

A sign across U.S.Highway 30 in Cozadmarker, Nebraskamarker prominently marks the place where the meridian intersects the routes of the Oregon Trail, Pony Express, transcontinental railroad, and the Lincoln Highway.

Wallace Stegner's Beyond the Hundredth Meridian(1954), is a biography of John Wesley Powell, an explorer of the American West.The song "At the Hundredth Meridian" by The Tragically Hipis about the 100th meridian west, specifically in Canada, and how it has traditionally been considered "where the great plains begin."

See also

See also

External links

Country, territory or sea
Arctic Oceanmarker
Nunavutmarker - Meighen Islandmarker
Peary Channelmarker
Nunavutmarker - Ellef Ringnes Islandmarker
Unnamed waterbody
Nunavutmarker - Berkeley Islands and Bathurst Islandmarker
Parry Channelmarker
Nunavutmarker - Prince of Wales Islandmarker
M'Clintock Channelmarker
Larsen Soundmarker
Passing just east of Gateshead Islandmarker, Nunavutmarker,
Victoria Straitmarker
Nunavutmarker - Royal Geographical Society Islandsmarker
Queen Maud Gulfmarker
Passing just east of Hat Islandmarker, Nunavutmarker,

> Manitobamarker
North Dakotamarker

> South Dakotamarker -

> Nebraskamarker -

> Kansasmarker -

> Oklahomamarker -

> Texasmarker / Oklahomamarker border -

> Texasmarker -

> Nuevo Leónmarker

> Tamaulipasmarker

> San Luis Potosímarker

> Tamaulipasmarker

> San Luis Potosímarker

> Guanajuatomarker

> Querétaromarker

> Mexico Statemarker

> Guerreromarker
Pacific Oceanmarker
Southern Oceanmarker
Unclaimed territory

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