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Coastal & Marine Geology Program > Center for Coastal & Watershed Studies > Professional Paper 1751

Systematic Mapping of Bedrock and Habitats along the Florida Reef Tract—Central Key Largo to Halfmoon Shoal (Gulf of Mexico)

USGS Professional Paper 1751

by Barbara H. Lidz, Christopher D. Reich, and Eugene A. Shinn

Introduction:
Table of Contents
Project Overview
Project Objective
Geologic Setting
Primary Datasets
Primary Products - Overview Maps & Evolution Overview:
Bedrock Surface map.
Introduction
Depth to Pleistocene Bedrock Surface
Reef & Sediment Thickness
Benthic Ecosystems & Environments
Sedimentary Grains in 1989
Summary Illustration Index Map
Evolution Overview
Tile-by-Tile Analysis
Satellite image of the Florida Keys showing location of tiles.
Organization of Report
Tiles: 1, 2, 3, 4,
5, 6, 7/8, 9/10,
11
Summary
Acknowledg-
ments
References
Disclaimer
Related
Publications

Tile 4

Tile 4 coordinates:
24°43'08.83" N. 81°10'46.19" W.
24°48'13.38" N. 80°55'23.13" W.
24°41'30.19" N. 80°52'35.36" W.
24°36'19.52" N. 81°07'59.14" W.
Major Geographic Sites: Tile 4 (middle Keys) includes Grassy Key, Crawl Key, Vaca Key, Boot Key, and Moser Channel, the widest channel in the Florida Keys (Fig. 68A, 68B). A submerged nearshore feature is East Sister Rock. East Washerwoman Shoal and other discrete groups of patch reefs occur in Hawk Channel. One of those groups is East Turtle Shoal, located south-southwest of Duck Key. A transect of treasure-salvor sand holes crosses sand and seagrass beds east of East Turtle Shoal. Offshore reefs include Coffins Patch, Delta Shoal, and Sombrero Key Reef. Coffins Patch and Sombrero Key Reef are both Sanctuary Preservation Areas (see Marine Sanctuaries).

Landsat satellite image of south Florida shows individual tile boundaries (blue rectangles) of this regional study in the Florida Keys National Marine Sanctuary. Tile 4 is highlighted.
Figure 68. (A) Landsat satellite image of south Florida shows individual tile boundaries (blue rectangles) of this regional study in the Florida Keys National Marine Sanctuary. Tile 4 is highlighted. (B) Index map shows locations of named reefs and shoals in the upper Keys and northeastern middle Keys, delineated by dashed lines. Red rectangles show geographic boundaries of Tiles 1, 2, 3, and 4, with Tile 4 and its geographic sites highlighted. Sanctuary boundary is in red; shelf-margin contour (blue) is in meters. [larger version]
 Index map shows locations of named reefs and shoals in the upper Keys and northeastern middle Keys

Coastal & Marine Geology Program > Center for Coastal & Watershed Studies > Professional Paper 1751

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