Petroleum seep
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A petroleum seep or oil spring is a place where natural liquid or gaseous hydrocarbons escape to the Earth's atmosphere and surface, normally under low pressure or flow. Seeps generally occur above ei
Naturally occurring oil seep near McKittrick, California, United States.
Petroleum seep near the Korňa in northern Slovakia.
Tar "volcano" in the Carpinteria, California, asphalt mine. Oil exudes from joint cracks in the petroliferous shale forming the floor of mine. 1906 photo, U.S. Geological Survey Bulletin 321
Tar bubble at La Brea Tar Pits, California
Helaeomyia petrolei
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The petroleum fly, Helaeomyia petrolei, is a species of fly from California, USA. The larvae feed on dead insects and other arthropods that become trapped in naturally occurring petroleum pools, makin
Petroleum seep
…Sulphur Mountain area date from the 1870s. Production was from tunnels dug into the face of a cliff, and produced by gravity drainage. The petroleum fly (Helaeomyia petrolei) is a species of fly that was first described from the La Brea Tar Pits and is found at other California seeps as well. It is highly unusual among…
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