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Coastal & Marine Geology Program > Center for Coastal & Regional Marine Studies > Geologic Characterization of Lakes and Rivers of Northeast Florida > OFR 00-180

Subsurface Characterization of Selected Water Bodies in the St Johns River Water Management District, Northeast Florida

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Sand Hill Lake (Lake Lowry)
Clay County, Florida

Introduction | Subsurface Characterization

Introduction

Sand Hill Lake Seismic Track Map.
Seismic Survey Track Map for Sand Hill Lake. Click on the image to see a larger version.
Sand Hill Lake (also known as Lake Lowry), located in Clay County (approximate latitude 29°50'22"N and longitude 81°0'12"), is a semicircular lake (about 2 by 3 km) with a 32.5 km perimeter and area of 7.6 km2 (see Seismic Survey Track Map). This lake, unlike Kingsley Lake, has buried and implied active subsidence features (Type 2). Like many of the lakes formed by sinkholes, Lake Lowery has a relatively shallow bottom (2-5 m) from the shore toward the center of the lake and a central part eight to ten meters deep.

Similar to Lakes Magnolia and Kingsley, Lowry is flanked on the west by the Trail Ridge deposits. The lake is underlain and surrounded by Citronella sediments (Clark, 1964), which consist of a relatively thick section of unconsolidated to semi-consolidated quartz sands, clayey sands, and gravels (see Fig. 5, Regional Geology). The sediments are unconsolidated and completely saturated, this enhances the filling process when sinkholes collapse or sediment is washed into the lakes by surface runoff. Generally the sands are seismically transparent but clay stringers or cementation may provide reflecting horizons.

Coastal & Marine Geology Program > Center for Coastal & Regional Marine Studies > Geologic Characterization of Lakes and Rivers of Northeast Florida > OFR 00-180

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Updated December 05, 2016 @ 11:25 AM (JSS)