Petroleum seep

Naturally occurring oil seep near McKittrick, California, United States.

Natural asphalt with embedded wood, Pitch Lake, Trinidad and Tobago. Asphalt has been produced from Pitch Lake since 1851.

A petroleum seep 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 either terrestrial or offshore petroleum accumulation structures. The hydrocarbons may escape along geological layers, or across them through fractures and fissures in the rock, or directly from an outcrop of oil-bearing rock.

单词	Petroleum seep
释义	Petroleum seep 英语百科 Petroleum seep A petroleum seep 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 either terrestrial or offshore petroleum accumulation structures. The hydrocarbons may escape along geological layers, or across them through fractures and fissures in the rock, or directly from an outcrop of oil-bearing rock.
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