tar seep

tar seep

[′tär ‚sēp]
(geology)
Natural tar that, because of its close proximity to the ground surface, seeps from cracks in the earth or from between rocks, often forming pits or pools.
References in periodicals archive ?
Maricopa is a southern California tar seep with representative flora and fauna of the Pleistocene and Recent periods.
Maricopa is a tar seep (brea) that has received little attention in the literature and is located in the southern San Joaquin Valley southwest of Bakersfield on land owned by the Mobil Oil Company (originally the Standard Oil Company).
A Fossil Rodent Fauna From the Maricopa Tar Seep, Kern County, California.
Allan Hancock donated to Los Angeles County the 23-acre plot that contained most of the tar seeps.