List of semiconsolidated sand and gravel aquifers

Science Center Objects

Semiconsolidated aquifers of the United States, which consist of semiconsolidated sand interbedded with silt, clay, and minor carbonate rocks.

To learn more, visit the Unconsolidated and Semiconsolidated Sand and Gravel Aquifers webpage for an overview, or access more extensive information from the Ground Water Atlas of the United States (USGS Hydrologic Atlas 730) by clicking on an individual region/chapter below.

 

Coastal lowlands aquifer system

Map of the Coastal Lowlands aquifer system

The Coastal lowlands aquifer system consists of unconsolidated deposits of Tertiary and Quaternary age that yield large quantities of water for public, industrial, and agricultural uses.

 

Texas coastal uplands aquifer system

Map of Texas Coastal Uplands aquifer system

The Texas coastal uplands aquifer system underlies an area of about 48,000 square miles in the upper part of the Coastal Plain. The aquifer system consists of unconsolidated deposits of early Teriary age that yield large quantities of water for agicultural, public, and industral supplies.

 

Mississippi embayment aquifer system

Map of the Mississippi Embayment aquifer system

The Mississippi embayment aquifer system is more than 5,000 feet thick in a wide area of south-central Louisiana and southwestern Mississippi.

Southeastern Coastal Plain aquifer system

Map of the Southeastern Coastal Plain aquifer system

The rocks comprising the five regional aquifers and three confining units of the Southeastern Coastal Plain aquifer system are exposed at the land surface as a seried of curved bands. The classic rocks of the aquifer system yield moderte volumes of water.

Northern Atlantic Coastal Plain aquifer system

Map of the Northern Atlantic Coastal Plain aquifer system

The aquifer system underlies an area of about 50,000 square miles. The western limit of the aquifer system is the landward edge of water-yielding Coastal Plain strata where they pinch out against crystalline rocks of the Piedmont Physiographic Province at the Fall Line. Unconsolidated sands compose the surficial aquifer, which is the uppermost water-yielding part of the aquifer system.