The Floridan aquifer system, composed of the Upper and Lower Floridan aquifers, is a sequence of Paleogene carbonate rock which spans an area of about...

sand, or silt). Aquifers vary greatly in their characteristics. The study of water flow in aquifers and the characterization of aquifers is called hydrogeology...

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...

Aquifer Edwards Aquifer Englishtown aquifer Floridan aquifer Great Miami aquifer Kirkwood–Cohansey aquifer Lloyd aquifer Magothy aquifer – largest of Long...

Spring, its most distinctive feature, which is fed by the powerful Floridan Aquifer. The spring was named in honor of Juan Ponce de León, an explorer who...

breaches of water to percolate down to recharge the layer below. The Floridan Aquifer, underneath the confining layer, underlies the entire state and portions...

in the more arid parts of the aquifer, is estimated to total only about 10 percent of annual withdrawals. Floridan Aquifer underlies the entire state of...

The Edwards Aquifer is one of the most prolific artesian aquifers in the world. Located on the eastern edge of the Edwards Plateau in the U.S. state of...

The Guarani Aquifer, located beneath the surface of Argentina, Brazil, Paraguay, and Uruguay, is the second largest known aquifer system in the world...

groundwater. A unit of rock or an unconsolidated deposit is called an aquifer when it can yield a usable quantity of water. The depth at which soil pore...