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The Ogallala Aquifer (oh-gə-LAH-lə) is a shallow water table aquifer surrounded by sand, silt, clay, and gravel located beneath the Great Plains in the United States. As one of the world's largest aquifers, it underlies an area of approximately 174,000 sq mi (450,000 km 2) in portions of eight states (South Dakota, Nebraska, Wyoming, Colorado, Kansas, Oklahoma, New Mexico, and Texas). [1]
The name "Boundary Waters" is often used in the U.S. to refer specifically to the U.S. Wilderness Area protecting its southern extent, the Boundary Waters Canoe Area Wilderness. The Boundary Waters region is characterized by a vast network of waterways and bogs within a glacially-carved landscape of Precambrian bedrock covered in thin soils and ...
The Pacific Basin is bounded by the Continental divide to the east and Pacific Ocean to the west; the basin excludes the endorheic Great Basin in the west. The Great Basin has a closed loop boundary encompassing substantially all of Nevada, the western half of Utah and parts of Oregon, California, Idaho, and Wyoming.
The Boundary Waters Canoe Area Wilderness doesn't take a backseat to, well, anything, but it'll have to now in one instance: it's no longer the largest dark sky "sanctuary" in the world. The skies ...
"Great Plains", or Western Plains, is also the ecoregion of the Great Plains or alternatively the western portion of the Great Plains. The Great Plains lie across both the Central United States and Western Canada, encompassing: Most or all of the U.S. states of Kansas, Nebraska, and North and South Dakota;
The Continental Divide in North America in red and other drainage divides in North America The Continental Divide in Central America and South America. The Continental Divide of the Americas (also known as the Great Divide, the Western Divide or simply the Continental Divide; Spanish: Divisoria continental de las Américas, Gran Divisoria) is the principal, and largely mountainous ...
Two great continental watersheds drained into it from east and west, diluting its waters and bringing resources in eroded silt that formed shifting delta systems along its low-lying coasts. There was little sedimentation on the eastern shores of the seaway; the western boundary, however, consisted of a thick clastic wedge eroded eastward from ...
U.S. Route 33/West Virginia Route 55 crosses the Divide in Pendleton County, West Virginia. At its northern terminus, the Eastern Continental Divide originates at Triple Divide Peak [a] in Ulysses Township, Pennsylvania, about 10 mi (16 km) south of the New York-Pennsylvania border, where it diverges from the St. Lawrence Divide.