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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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Kingsley Lake
Clay County, Florida

Introduction | Subsurface Characterization

Introduction

Kingsley Lake Seismic Track Map.
Seismic Survey Track Map for Kingsley Lake showing profile locations, survey track lines, and karst features. Click on the image to see a larger version.
Kingsley Lake is a circular lake centered at approximately latitude 29°57'54"N and longitude 82°W in west-central Clay County, Florida (See Index Map, Lake 1). The lake is located within the Trail Ridge area of Sea Island District. Kingsley Lake is flanked on the west by the Trail Ridge deposits and is underlain and surrounded by Citronelle sediments (Clark, 1964) that consist of a relatively thick section of unconsolidated to semi-consolidated quartz sands, clayey sands, and gravels. The Trail Ridge sands are above an elevation of 45 m (149 ft) and are mined commercially for heavy minerals used in paints and abrasives. These 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.

Lake level at the time of the seismic survey was 54 m (176 ft) NGVD. This circular lake is approximately 3.2 km in diameter with a perimeter of 12.8 km and surface area of 5.6 km2. The deepest part (40 ms, ~30 m) of the lake southeast is of the center where a large, steep-sided, collapse sinkhole is located. Otherwise, the lake is shallow around the shoreline, gradually deepening to 6 m (Seismic Survey Track Map). Towards the center of the lake the bottom slope steepens and increases in depth from 6 to 15 m (Seismic Survey Track Map).

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)