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Geology of the United States. Shaded relief map of the United States, showing 10 geological provinces. The richly textured landscape of the United States is a product of the dueling forces of plate tectonics, weathering and erosion. Over the 4.5 billion-year history of the Earth, tectonic upheavals and colliding plates have raised great ...
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 United States Geological Survey (USGS), founded as the Geological Survey, is an agency of the U.S. Department of the Interior whose work spans the disciplines of biology, geography, geology, and hydrology. The agency was founded on March 3, 1879, to study the landscape of the United States, its natural resources, and the natural hazards ...
Kirkwood–Cohansey aquifer. The Kirkwood-Cohansey aquifer is an aquifer system in the New Jersey Pine Barrens. It covers approximately 3,000 square miles (7,800 km 2) [1] and receives about 44 inches of precipitation each year. About fifty percent of this water is transpired by vegetation or evaporates back into the atmosphere.
Map showing the Upper and Lower Colorado River Basin, and adjacent areas supplied by Colorado River water. The Colorado River Basin consists of 246,000 square miles (640,000 km 2), making it the seventh largest drainage basin in North America. [2] About 238,600 square miles (618,000 km 2), or 97 percent of the basin, is in the United States. [40]
A section of the Intracoastal Waterway in Pamlico County, North Carolina, crossed by the Hobucken Bridge. The Intracoastal Waterway (ICW) is a 3,000-mile (4,800 km) inland waterway along the Atlantic and Gulf of Mexico coasts of the United States, running from Massachusetts southward along the Atlantic Seaboard and around the southern tip of Florida, then following the Gulf Coast to ...
The United States Geological Survey adapted Fenneman's scheme in their Physiographic division of the United States. [7] The "section" is somewhat larger than the hydrographic definition. The Great Basin Culture Area or indigenous peoples of the Great Basin is a cultural classification of indigenous peoples of the Americas and a cultural region ...
The Grand Canyon, carved by the mighty Colorado River, is 277 miles (446 km) long, up to 1 mile (1.6 km) deep, and up to 15 miles (24 km) wide. Millions of years of erosion have resulted in a massive three-tiered canyon, exposing the multicolored layers of the Colorado Plateau in mesas and canyon walls, visible from trails that descend into the ...