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These areas show anomalously high or low amplitude response over the background response, and include:\n\nPositive- Slow to moderate hydrocarbon seepage\nNegative- Rapid expulsion of sediment, brine, and hydrocarbons\nMud volcano- Cones created by negative anomalies\nConfirmed mud volcano- Direct observation of mud volcanos\nFlow- Sediment flows from fast moving sediment or hydrocarbons\nPockmark- Circular to oval depressions created by the rapid removal of sediment\nCretaceous- Outcrops of Cretaceous-aged carbonate rock\nLithologic- Outcrops of Cretaceous-aged carbonate rock\nSalt- Salt outcrops (not seep related)\nSlump- Downslope sediment flows\nFan- Submarine channels and sand rich turbidite fans\nConfirmed organisms- Direct observation of chemosynthetic and coral communities\nConfirmed coral- Direct observation of benthic corals\nConfirmed gas hydrate- Direct observation of gas hydrate occurrences\nConfirmed gas- Direct observation of gas plumes\nConfirmed oil- Direct observation of oil seepage\nPossible oil positive- high positive oil seepage located under an oil slick\nPossible oil negative- low positive oil seepage located under an oil slick\n\nFor more detailed information, and individual layers for download:\nhttp://www.boem.gov/Oil-and-Gas-Energy-Program/Mapping-and-Data/Map-Gallery/Seismic-Water-Bottom-Anomalies-Map-Gallery.aspx\n", "geometryType": "esriGeometryPolygon", "sourceSpatialReference": { "wkid": 102100, "latestWkid": 3857 }, "copyrightText": "MarineCadastre.gov", "parentLayer": null, "subLayers": [], "minScale": 0, "maxScale": 0, "drawingInfo": { "renderer": { "type": "uniqueValue", "field1": "TYPE", "field2": null, "field3": null, "defaultSymbol": null, "defaultLabel": null, "uniqueValueInfos": [ { "symbol": { "type": "esriSFS", "style": "esriSFSSolid", "color": [ 255, 0, 0, 255 ], "outline": { "type": "esriSLS", "style": "esriSLSSolid", "color": [ 255, 0, 0, 255 ], "width": 2 } }, "value": "positive anomaly", "label": "Positive Anomaly", 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