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  2. Geology of the United States - Wikipedia

    en.wikipedia.org/wiki/Geology_of_the_United_States

    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 ...

  3. United States Geological Survey - Wikipedia

    en.wikipedia.org/wiki/United_States_Geological...

    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 ...

  4. Geologic mapping of Georgia (U.S. state) - Wikipedia

    en.wikipedia.org/wiki/Geologic_mapping_of...

    Geologic mapping of Georgia is the creation of geologic maps —special-purpose maps made to show geological features—of the State of Georgia in the United States. Rock units or geologic strata are shown by colors or symbols to indicate where they are exposed at the surface. Structural features such as faults and shear zones are also shown.

  5. Geology of Nebraska - Wikipedia

    en.wikipedia.org/wiki/Geology_of_Nebraska

    The geology of Nebraska is part of the broader geology of the Great Plains of the central United States. Nebraska's landscape is dominated by surface features, soil and aquifers in loosely compacted sediments, with areas of the state where thick layers of sedimentary rock outcrop. Nebraska's sediments and sedimentary rocks lie atop a basement ...

  6. Geology of North Dakota - Wikipedia

    en.wikipedia.org/wiki/Geology_of_North_Dakota

    The water table in North Dakota ranges between 15 and 50 feet deep, or 100 feet in upland areas. Fully wet areas are recognized in drill cores by unoxidized dark material. The lignite and sandstone of the Fort Union Group in the west is the top groundwater unit and a common source of water for farms and ranches.

  7. Marie Tharp - Wikipedia

    en.wikipedia.org/wiki/Marie_Tharp

    Marie Tharp (July 30, 1920 – August 23, 2006) was an American geologist and oceanographic cartographer. In the 1950s, she collaborated with geologist Bruce Heezen to produce the first scientific map of the Atlantic Ocean floor. [1] Her cartography revealed a more detailed topography and multi-dimensional geographical landscape of the ocean ...

  8. Geographic Names Information System - Wikipedia

    en.wikipedia.org/wiki/Geographic_Names...

    The logo of the United States Geological Survey (USGS) The Geographic Names Information System (GNIS) is a database of name and location information about more than two million physical and cultural features throughout the United States and its territories; the associated states of the Marshall Islands, Federated States of Micronesia, and Palau; and Antarctica.

  9. Geology of Delaware - Wikipedia

    en.wikipedia.org/wiki/Geology_of_Delaware

    The Delaware Geological Survey is the primary source of information about Delaware geology and hydrogeology, such as surface and sub-surface geologic rock formations, extent and quality of aquifers, stream and groundwater monitoring, water supply, earthquakes, floods and droughts, coastal processes (tides, beach erosion), topographic mapping ...

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