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Tar Mound (Geoform Type)

Component: Geoform

Unique Identifier: 131

Geoform Origin Geologic
Geoform Mound/Hummock
Geoform Type Tar Mound

Definition A mound of extruded tar (or other viscous hydrocarbons) on the seafloor that has some relief above the surrounding bottom. Tar mounds in southern California are typically 10 - 100 meters in diameter and can coalesce to form tar reefs. Over time, tar mounds can come to support a diversity of colonizing organisms (Lorenson et al. 2009).