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The first statewide geologic map of Georgia was published in 1825. It was a 1:1,000,000 scale map of Georgia and Alabama published by Henry Schenck Tanner. [3] In 1849 W.T. Williams published the geological features for the state on a 1:120,000 scale map within George White's (1849) Statistics of the State of Georgia report. [4]
Aquifers of the United States Withdrawal rates from the Ogallala Aquifer.. This is a list of some aquifers in the United States.. Map of major US aquifers by rock type. An aquifer is a geologic formation, a group of formations, or a part of a formation that contains sufficient saturated permeable material to yield significant quantities of water to groundwater wells and springs.
The geological eastern Blue Ridge includes metavolcanic rocks of the Georgia Gold Belt. [5] From the discovery of gold in the Georgia Gold Belt in 1828, enough gold was mined in the area to cause a branch mint of the United States Mint to be located in Dahlonega, Georgia. The region also includes igneous intrusions of granite and diabase. [6]
The highest area in Georgia is Brasstown Bald which is 1,458 m (4,783 ft) above sea level, while the lowest is at sea level, at the Atlantic Ocean. Georgia is located at approximately 33° N 83.5° W. The state has a total area of 154,077 km 2 (59,489 sq mi) and the geographic center is located in Twiggs County. [3]
This map of United States water resource subregion hydrologic units updated boundaries to include the ocean as well as the portions of the basins that cross international borders For the use of hydrologists, ecologists, and water-resource managers in the study of surface water flows in the United States, the United States Geological Survey ...
USGS Geographic Names Information System; USGS Hydrologic Unit Map - State of Georgia (1974) Graham, Paul K. (2010). Atlas of East and Coastal Georgia Watercourses and Militia Districts. The Genealogy Company. ISBN 0-9755312-3-9.
The Satilla drains almost 4,000 square miles (10,000 km 2) of land, all of it in the coastal plain of southeastern Georgia. It has white sandbars and is the largest blackwater river situated entirely within Georgia. [2] [3] The Satilla enters the Atlantic Ocean about 10 miles (16 km) south of Brunswick, at the 31st parallel north.
The extent of internal drainage, the area in which surface water cannot reach the ocean, defines the geographic region called the Great Basin. [7] The Great Basin's internal drainage results from blockage of water movement by high fault-created mountains and by lack of sufficient water flow to merge with larger drainages outside of the Great Basin.