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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 ContentsProject OverviewProject ObjectiveGeologic SettingPrimary DatasetsPrimary Products -  Overview Maps & Evolution Overview:IntroductionDepth to Pleistocene Bedrock SurfaceReef & Sediment ThicknessBenthic Ecosystems & EnvironmentsSedimentary Grains in 1989Summary Illustration Index MapEvolution OverviewTile-by-Tile AnalysisOrganization of ReportTiles:1,2, 3, 4,5, 6, 7/8, 9/10,11SummaryAcknowledg-																			mentsReferencesDisclaimerRelated																			PublicationsTable of ContentsProject Overview					      Introduction      Mapping the Florida Reef TractProject ObjectiveGeologic SettingPrimary Datasets	      Introduction      Seismic Profiles—Data Acquisition and Processing      Seismic Profiles—Data Integration      Aerial Photomosaics      Thin Sections of Surface SedimentsPrimary Products	      Introduction	      Overview Map—Depth to Pleistocene Bedrock Surface      Overview Map—Reef and Sediment Thickness      Overview Map—Benthic Ecosystems and Environments      Overview Map—Sedimentary Grains in 1989      Overview Map—Summary Illustration Index Map      Evolution Overview—Coral Ages and Shelf-Edge Models		            Introduction            Seven Coral Reef Ecosystems            Two Coral Reef ArchitecturesOrganization of Report	      Tile-by-Tile Analysis		      Data Limitations		      Overall Setting and EnvironmentTile 1			      Geography            Tile 1 Coordinates            Major Geographic Sites      Sector-Specific Studies							            Hydrology					      Geologic Highlights							            Rodriguez Key				            Sinkhole				            Captain Roy's Reef				            Grecian Rocks				            Key Largo Dry Rocks				            Mosquito Bank, White Bank, Coral-Rock Ridges, and French Reef					            Carysfort Reef				            The Elbow				            Molasses Reef and Little Molasses Island				            Pickles ReefTile 2			      Geography				 			            Tile 2 Coordinates	 			            Major Geographic Sites	 			 	      Sector-Specific Studies	 			 			            Sclerochronology	 			 	      Geologic Highlights	 			 			            Nearshore Rock Ledge	 			            Plantation, Windley, and Lignumvitae Keys	 			            Tavernier Key	 			            Conch Reef	 			            Davis and Alligator ReefsTile 3			      Geography							            Tile 3 Coordinates				            Major Geographic Sites					      Sector-Specific Studies							            Tidal Passes and Pleistocene Riverbeds				            Sedimentary Petrology					      Geologic Highlights							            Tennessee ReefTile 4			      Geography							            Tile 4 Coordinates				            Major Geographic Sites					      Sector-Specific Studies							            Topographic Features in Bedrock					      Geologic Highlights							            East Sister Rock				            Moser Channel			            East Washerwoman Shoal and Other Patch Reefs in Hawk Channel				            East Turtle Shoal						            Coffins Patch				            Delta Shoal and Sombrero Key ReefTile 5			      Geography							            Tile 5 Coordinates				            Major Geographic Sites					      Sector-Specific Studies							            Bands of Outer-Shelf Coral-Rock Ridges					      Geologic Highlights							            Moser Channel				            Bahia Honda Channel				            Ramrod, Torch, and Big Pine KeysTile 6			      Geography							            Tile 6 Coordinates			            Major Geographic Sites					      Sector-Specific Studies				            Marine Sanctuaries, Marine Archaeology, and Looe Key Reef						            Marine Sanctuaries						            Marine Archaeology						            Looe Key Reef										      Geologic Highlights							            Saddlebunch Keys				            West Washerwoman					            American, Maryland, and Pelican Shoals				            Eastern SamboTile 7/8			      Geography							            Tile 7 Coordinates				            Tile 8 Coordinates				            Major Geographic Sites					      Natural Stressors: Atmospheric, Terrestrial, and Oceanic Sources														                  Introduction					                  Natural Stressors                  Atmospheric Sources				                  Terrestrial Sources					                  Oceanic Sources					                  Hurricanes, Storm Surge, and Rising Sea Level									      Geologic Highlights							            Boca Chica Key, Key West, Fleming Key, and Urbanization				            Middle Sambo, Western Sambo, and Eastern Dry Rocks            Rock Key and Sand Key Reefs       Margin Evolution		       Flooding the Florida Shelf       Addendum	              Introduction	              New Evidence for Interpretation of the Nearshore Rock Ledge	              New Coral Reef Nuclei	              When Did the Upper-Slope Terrace Form?	              Why Did the Pleistocene Reefs Become So Imposing?						              Age of the Marquesas - Quicksands Ridge				       Ephemeral Islands and LighthousesTile 9/10			      Geography							            Tile 9 Coordinates				            Tile 10 Coordinates				            Major Geographic Sites					      Sector-Specific Studies							            Impact of Exploratory Oil Wells on Benthic Habitats off Florida											                  Well Site D/E-1						                  Well Site 826Y						                  Well Site A						                  Well Site C						                  Well Site B						                  Well Site G4950						                  Well Site G3906										      Geologic Highlights							            Boca Grande Key, Boca Grande Channel, and the Marquesas Keys				            Cosgrove Shoal and Coalbin RockTile 11			      Geography							            Tile 11 Coordinates				            Major Geographic Sites					      Geologic Highlights							            The Marquesas - Quicksands Ridge				            Ellis Rock and New Ground Shoal				            Halfmoon Shoal								            Rebecca Shoal				            The QuicksandsSummary			      Modern Reefs and the Rock Record							            Limestone Compaction				            Ancient Reefs			      Fate of the Present Coral Reef EcosystemAcknowledgmentsReferencesDisclaimerRelated Online Publications
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Coastal & Marine Geology Program >Center for Coastal & Watershed Studies > Professional Paper 1751
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