The Floridan aquifer system, composed of the Upper and Lower Floridan aquifers, is a thick sequence of Paleogene carbonate rock which spans an area of about in the southeastern United States, it underlies parts of which  state in the southern region of the United States, with part of its southern border formed by the Gulf of Mexico, and its western border is formed by the Mississippi River?
Floridan aquifer The Floridan aquifer system, composed of the Upper and Lower Floridan aquifers, is a thick sequence of Paleogene carbonate rock which spans an area of about in the southeastern United States. It underlies the entire state of Florida and parts of Alabama, Georgia, Mississippi, and South Carolina.
Natchez District The Natchez District was one of two areas established in the Kingdom of Great Britain's West Florida colony during the 1770sthe other being the Tombigbee District. The first Anglo settlers in the district came primarily from other parts of British America. The district was recognized to be the area east of the Mississippi River from Bayou Sara in the south (presently St. Francisville, Louisiana) and Bayou Pierre in the north (presently Port Gibson, Mississippi). Today, this area corresponds roughly with and includes most of the lands south of Interstate 20 and west of Interstate 55 in the state of Mississippi, in the southwest corner of the state.