The Lithostratigraphy of the Hawthorn Group (Miocene) of Florida

The Hawthorn Formation has been a problematic unit for geologists since its inception by Dall and Harris (1892). It is a complex unit consisting of interbedded and intermixed carbonate and siliciclastic sediments containing varying percentages of phosphate grains. These sediments have been widelystudied by geologists due to their economic and hydrologic importance in the southeastern United States. Economically, the Hawthorn sediments contain vast quantities of phosphate and clay and limited amounts of uranium. Hydrologically, the Hawthorn contains secondary artesian aquifers, provides anaquiclude for the Floridan aquifer system and, in some areas, makes up the upper portion of the Floridan aquifer system.

Publisher - Florida Geological Survey

Subjects - Geology, Hawthorn Formation

Citation: cott TM. 1988. The Lithostratigraphy of the Hawthorn Group (Miocene) of Florida. Tallahassee (FL): Florida Geological Survey. 148 pp