Bureau of Ocean Energy management 20160621 vector digital data New Orleans, LA Bureau of Ocean Energy Management https://www.boem.gov/BOEM-Seafloor-Anomalies-Layer-Package/ https://gis.boem.gov/arcgis/rest/services/BOEM_BSEE/GOM_Layers/MapServer/9 https://gis.boem.gov/arcgis/rest/services/BOEM_BSEE/MMC_Layers/MapServer/24 https://www.boem.gov/Seismic-Water-Bottom-Anomalies-Map-Gallery/ https://gis.boem.gov/arcgis/services/BOEM_BSEE/GOM_Layers/MapServer/WMSServer/ Since 1998, geoscientists at the Bureau of Ocean Energy Management (BOEM) have identified and mapped over 31,000 water bottom (seafloor) acoustic amplitude anomalies in the deep water northern Gulf of Mexico (GOM) using 3-D time-migrated seismic surveys. The purpose of this mapping program is to understand the distribution of natural hydrocarbon seeps and related benthic fauna (chemosynthetic and coral communities) in the GOM, and to characterize other seafloor features related to the geological framework of the seafloor. These areas show anomalously high or low acoustic amplitude response relative to typical background, with most areas having overlapping seismic coverage by two or more surveys. These results cover over 230,000 square kilometers of seismic data interpretation. See BOEM website for more detailed information, https://www.boem.gov/Oil-and-Gas-Energy-Program/Mapping-and-Data/Map-Gallery/Seismic-Water-Bottom-Anomalies-Map-Gallery.aspx File contains the shapefiles and layers for different types of seafloor acoustic amplitude anomalies in the Northern Gulf of Mexico, as interpreted on 3D seismic data. Types include natural oil and gas seep sites, hardgrounds, benthic communities, tubidite fans and slumps, seafloor channels, gas plumes observed in the water column, and more. 19980101 20140301 Deepwater Northern Gulf of Mexico Complete Annually -96.966580 -85.475399 29.249310 25.541709 NGDA Portfolio Themes Geology Theme NGDA National Geospatial Data Asset ISO 19115 Topic Categories geoscientificInformation planningCadastre biota environment oceans None Gulf of Mexico None Although these data have been processed successfully on a computer system at the Bureau of Ocean Energy Management, no warranty expressed or implied is made regarding the accuracy or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. It is also strongly recommended that careful attention be paid to the contents of the metadata file associated with these data to evaluate data set limitations, restrictions or intended use. The Bureau of Ocean Energy Management shall not be held liable for improper or incorrect use of the data described and/or contained herein. These data are not to be used for navigation. Bureau of Ocean Energy Management William Shedd Supervisor Regional Analysis Unit unknown

1201 Elmwood Park Blvd

New Orleans LA 70123 (504) 736-2497 william.shedd@boem.gov DOI - BOEM - William Shedd, Kody Kramer, Greg Boland; NOAA - Office of Ocean Exploration and Research - Chemo III and Lophelia II Expeditions; Louisiana State University - Coastal Studies Institute - Harry Roberts, P.h.D.; Florida State University - Ian MacDonald, Ph.D.; Penn State University - Charles Fisher, P.h.D.; Temple University - Erik Cordes, P.h.D; Texas A&M University - Geochemical and Environmental Research - J. Brooks and B. Bernard; Woods Hole Oceanographic Institute; And many others. Full list available. Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; Esri ArcGIS 10.3.1.4959 Tests for integrity have not been performed. Features represented have not been tested for completeness .0001 Research Seismic information to find anomalous information and digitize and classify those polygons 06011998 Vector GT-polygon composed of chains 32508 NAD 1927 BLM Zone 16N 0.9996 -87.0 0.0 1640416.666666667 0.0 coordinate pair 0.000000007283462721829893 0.000000007283462721829893 foot_us D North American 1927 Clarke 1866 6378206.4 294.9786982 WBA_Metadata BOEM FID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. Type Domain Droid Name Comment Project Bureau of Ocean Energy Management Branch Chief Geospatial Services Division mailing and physical address

45600 Woodland Road

Sterling VA 20166 703-787-1312 boemosr-gsd@boem.gov http://boem.gov Downloadable Data Although these data have been processed successfully on a computer system at the Bureau of Ocean Energy management, makes no warranty expressed or implied is made regarding the accuracy or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. It is also strongly recommended that careful attention be paid to the contents of the metadata file associated with these data to evaluate data set limitations, restrictions or intended use. The Bureau of Ocean Energy Management shall not be held liable for improper or incorrect use of the data described and/or contained herein. 20210201 20161215 Bureau of Ocean Energy Management Kody Kramer Geoscientist unknown

1201 Elmwood Park Blvd

New Orleans LA 70123 (504) 736-2957 william.shedd@boem.gov FGDC Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998 local time