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.
Northern Panhandle of West Virginia The Northern Panhandle is the northern of the two panhandles in the U.S. state of West Virginia. It is a culturally and geographically distinct region of the state. It is the state's northernmost extension, bounded by Ohio and the Ohio River on the north and west and the state of Pennsylvania on the east. Its unusual configuration is the result of the Revolutionary-era claims of Virginia's former Yohogania County boundary lying along the Ohio River, conflicting with interpretations of the Colony of Pennsylvania's royal charter. The conflict was settled by compromise in the 1780s. Today, due to the southern boundary being an extension of the Mason–Dixon line and the panhandle's proximity to the Pittsburgh area, the Northern Panhandle resembles more of the Midwestern United States or the Northeastern United States compared to the rest of the state (including the Eastern Panhandle of West Virginia), which is classified as part of the Upland South.