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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: 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 Organization of Report Tiles: 1, 2, 3, 4, 5, 6, 7/8, 9/10, 11 Summary Acknowledg- ments References Disclaimer Related Publications

Tile 2 Geography Sector-Specific Studies Geologic Highlights Tile 2 coordinates: 24°54'25.60" N. 80°42'53.23" W. 25°03'00.38" N. 80°29'34.02" W. 24°57'01.47" N. 80°24'52.12" W. 24°48'24.89" N. 80°38'09.90" W. Major Geographic Sites: Tile 2 (upper Keys) includes Plantation Key, Snake Creek, Whale Harbor Channel, Windley Key, Islamorada, Upper Matecumbe Key, Lignumvitae Key, Indian Key Channel, Indian Key, Lower Matecumbe Key, and nearshore Tavernier Key (Fig. 42A, 42B). Shelf features include Hen and Chickens patch reef in Hawk Channel. Offshore reefs include Conch and adjacent Little Conch, Davis, Crocker, and Alligator Reefs. Sanctuary Preservation Areas have been established at Conch and Davis Reefs, Hen and Chickens patch reef, Cheeca Rocks (located just off Islamorada due west of Crocker Reef), and at Alligator Reef (see Marine Sanctuaries). Conch Reef is also a Research Only Area. Figure 42. (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 2 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 and 2, with Tile 2 and its geographic sites highlighted. Sanctuary boundary is in red; shelf-margin contour (blue) is in meters. [larger version] continue to: Sector-Specific Studies

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