Test wells used in the study, Surface-Geophysical Characterization of Ground-Water Systems of the Caloosahatchee River Basin, Southern Florida, 2001, USGS WRIR 01-4084 table 1

Seven test coreholes were drilled to calibrate lithostratigraphic units, their stratal geometries, and estimated hydraulic conductivities to surface-geophysical profiles. A continuous marine seismic-reflection survey was conducted over the entire length of the Caloosahatchee River and extending into San Carlos Bay. Lithostratigraphic units that intersect the river bottom and their characteristic stratal geometries were identified.

Depth to geologic contacts and hydrogeologic units, orientation of bedding, lithologic types and thickness, and sequence stratigraphy are interpreted from seismic-reflection and ground-penetrating radar (GPR) profiles. Lithologic descriptions of seven test coreholes are linked to the geophysical interpretations to provide an accurate hydrogeologic framework. Micropaleontologic and strontium-isotope data provide temporal constraints that guide correlation of reflections on seismic profiles and of lithologic units in cores.