{"accessLevel": "public", "bureauCode": ["010:12"], "contactPoint": {"@type": "vcard:Contact", "fn": "VeeAnn A. Cross", "hasEmail": "mailto:vatnipp@usgs.gov"}, "description": "Apalachicola Bay and St. George Sound contain the largest oyster fishery in Florida, and the growth and distribution of the numerous oyster reefs here are the combined product of modern estuarine conditions and the late Holocene evolution of the bay. A suite of geophysical data and cores were collected during a cooperative study by the U.S. Geological Survey, the National Oceanic and Atmospheric Administration Coastal Services Center, and the Apalachicola National Estuarine Research Reserve to refine the geology of the bay floor as well as the bay's Holocene stratigraphy. Sidescan-sonar imagery, bathymetry, high-resolution seismic profiles, and cores show that oyster reefs occupy the crests of sandy shoals that range from 1 to 7 kilometers in length, while most of the remainder of the bay floor is covered by mud. The sandy shoals are the surficial expression of broader sand deposits associated with deltas that advanced southward into the bay between 6,400 and 4,400 years before present. The seismic and core data indicate that the extent of oyster reefs was greatest between 2,400 and 1,200 years before present and has decreased since then due to the continued input of mud to the bay by the Apalachicola River. The association of oyster reefs with the middle to late Holocene sandy delta deposits indicates that the present distribution of oyster beds is controlled in part by the geologic evolution of the estuary. For more information on the surveys involved in this project, see http://woodshole.er.usgs.gov/operations/ia/public_ds_info.php?fa=2005-001-FA and http://woodshole.er.usgs.gov/operations/ia/public_ds_info.php?fa=2006-001-FA.", "distribution": [{"@type": "dcat:Distribution", "accessURL": "http://pubs.usgs.gov/of/2012/1003/html/catalog.html", "description": "Landing page for access to the data", "format": "XML", "mediaType": "application/http", "title": "Digital Data"}, {"@type": "dcat:Distribution", "description": "The metadata original format", "downloadURL": "https://data.usgs.gov/datacatalog/metadata/USGS.39b4e567-e198-46e0-a349-502762a5207d.xml", "format": "XML", "mediaType": "text/xml", "title": "Original Metadata"}], "identifier": "http://datainventory.doi.gov/id/dataset/USGS_39b4e567-e198-46e0-a349-502762a5207d", "keyword": ["EdgeTech FSSB 424", "Field Activity 2006-001-FA", "navigation", "United States", "Woods Hole Coastal and Marine Science Center", "seismic-reflection", "Florida", "location", "geospatial datasets", "Apalachicola Bay", "St. Vincent Island", "Field Activity Serial Number 06001", "R/V Rafael", "Info Bank ID R-1-06-GM", "Chirp seismics", "North America", "Coastal and Marine Geology Program", "Apalachicola National Estuarine Research Reserve", "Autonomous Surface Vessel", "U.S. Geological Survey", "WHCMSC", "Gulf of Mexico", "elevation", "USGS", "CMGP", "St. George Island", "marine geophysics", "interpretation", "Independently (or) Remotely Influenced Surveyor", "Little St. George Island", "shapefile", "geologic structure", "oceans", "geoscientificInformation", "seismic interpretation", "USGS:39b4e567-e198-46e0-a349-502762a5207d", "scientific interpretation", "ASV IRIS"], "modified": "2024-03-18T00:00:00Z", "publisher": {"@type": "org:Organization", "name": "U.S. Geological Survey"}, "spatial": "-85.094055, 29.602959, -84.877486, 29.717944", "theme": ["geospatial"], "title": "Point Shapefile of the Interpreted Flooding Surface Isopach Based on Seismic-Reflection Profiles Collected in Apalachicola Bay in 2006 from U.S. Geological Survey Cruise 06001 (FLOODISO_GEOG.SHP, Geographic, WGS84)"}