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Long Beach Oil Field
The Long Beach Oil Field is a large oil field underneath the cities of Long Beach, California, Long Beach and Signal Hill, California, Signal Hill, California, in the United States. Discovered in 1921, the field was enormously productive in the 1920s, with hundreds of oil derricks covering Signal Hill and adjacent parts of Long Beach; largely due to the huge output of this field, the Los Angeles Basin produced one-fifth of the nation's oil supply during the early 1920s. In 1923 alone the field produced over 68 million barrels of oil, and in barrels produced by surface area, the field was the world's richest.Schmitt, R. J., Dugan, J. E., and M. R. Adamson. "Industrial Activity and Its Socioeconomic Impacts: Oil and Three Coastal California Counties." MMS OCS Study 2002-049. Coastal Research Center, Marine Science Institute, University of California, Santa Barbara, California. MMS Cooperative Agreement Number 14-35-01-00-CA-31603. 244 pages; p. 47. The field is eighth-largest by cum ...
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Petroleum Reservoir
A petroleum reservoir or oil and gas reservoir is a subsurface accumulation of hydrocarbons contained in porous or fractured rock formations. Such reservoirs form when kerogen (ancient plant matter) is created in surrounding rock by the presence of high heat and pressure in the Earth's crust. Petroleum reservoirs are broadly classified as ''conventional'' and '' unconventional'' reservoirs. In conventional reservoirs, the naturally occurring hydrocarbons, such as crude oil or natural gas, are trapped by overlying rock formations with lower permeability, while in unconventional reservoirs, the rocks have high porosity and low permeability, which keeps the hydrocarbons trapped in place, therefore not requiring a cap rock. Reservoirs are found using hydrocarbon exploration methods. Oil field An oil field is an area of accumulation of liquid oil underground in multiple (potentially linked) reservoirs, trapped as it rises by impermeable rock formations. In industrial terms, an o ...
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Puente Formation
The Puente Formation is a geologic formation in California. It preserves fossils dating back to the Neogene period. See also * List of fossiliferous stratigraphic units in California * Paleontology in California Paleontology in California refers to paleontologist research occurring within or conducted by people from the U.S. state of California. California contains rocks of almost every age from the Precambrian to the Recent. Precambrian fossils are pres ... References * Neogene California {{Neogene-stub ...
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Miocene
The Miocene ( ) is the first geological epoch of the Neogene Period and extends from about (Ma). The Miocene was named by Scottish geologist Charles Lyell; the name comes from the Greek words (', "less") and (', "new") and means "less recent" because it has 18% fewer modern marine invertebrates than the Pliocene has. The Miocene is preceded by the Oligocene and is followed by the Pliocene. As Earth went from the Oligocene through the Miocene and into the Pliocene, the climate slowly cooled towards a series of ice ages. The Miocene boundaries are not marked by a single distinct global event but consist rather of regionally defined boundaries between the warmer Oligocene and the cooler Pliocene Epoch. During the Early Miocene, the Arabian Peninsula collided with Eurasia, severing the connection between the Mediterranean and Indian Ocean, and allowing a faunal interchange to occur between Eurasia and Africa, including the dispersal of proboscideans into Eurasia. During the ...
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Repetto Formation
The Repetto Formation is a Pliocene epoch sedimentary unit in the greater Los Angeles Basin composed primarily of sandstone and conglomerate. Geology The unit records deposition of a submarine fan environment at lower bathyal depths, and is recognized as a productive petroleum reservoir.Repetto Formation, at Bureau of Economic Geology, University of Texas, Austin
Blake, Gregg H. 1991. "Review of the Neogene biostratigraphy and stratigraphy of the Los Angeles Basin and implications for basin evolution," In: Biddle, Kevin T. (ed), "Active Margin Basins", AAPG Memoir 52, 319pp. The formation is overlain by the

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Pliocene
The Pliocene ( ; also Pleiocene) is the epoch in the geologic time scale that extends from 5.333 million to 2.58See the 2014 version of the ICS geologic time scale
million years ago. It is the second and most recent epoch of the Neogene Period in the . The Pliocene follows the Epoch and is followed by the Epoch. Prior to the 2009 ...
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Catalina Schist
The Catalina Schist is a metamorphic rock complex primarily exposed on Santa Catalina Island of the Channel Islands of California. It formed during the Cretaceous Period of the Mesozoic Era. Geology The Catalina Schist is broadly correlated with the Franciscan Complex, a similar metamorphic complex formed along the California margin.Rowland, Stephan M., ''Geology of Santa Catalina Island,'' California Geology, 1984 Both of these units record high-pressure/low-temperature metamorphism associated with the subduction of the Farallon plate beneath North America during the Mesozoic Era. The Catalina Schist is differentiated from the Franciscan primarily in the style of mélange formed during subduction. In the Los Angeles Harbor Region, Catalina Schist is associated with the Wilmington Oil Field The Wilmington Oil Field is a prolific petroleum field in Los Angeles County in southern California in the United States. Discovered in 1932, it is the third largest oil field in the ...
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Anticline
In structural geology, an anticline is a type of fold that is an arch-like shape and has its oldest beds at its core, whereas a syncline is the inverse of an anticline. A typical anticline is convex up in which the hinge or crest is the location where the curvature is greatest, and the limbs are the sides of the fold that dip away from the hinge. Anticlines can be recognized and differentiated from antiforms by a sequence of rock layers that become progressively older toward the center of the fold. Therefore, if age relationships between various rock strata are unknown, the term antiform should be used. The progressing age of the rock strata towards the core and uplifted center, are the trademark indications for evidence of anticlines on a geologic map. These formations occur because anticlinal ridges typically develop above thrust faults during crustal deformations. The uplifted core of the fold causes compression of strata that preferentially erodes to a deeper st ...
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Inglewood Oil Field
The Inglewood Oil Field in Los Angeles County, California, is the 18th-largest oil field in the state and the second-most productive in the Los Angeles Basin. Discovered in 1924 and in continuous production ever since, in 2012 it produced approximately 2.8 million barrels of oil from some five hundred wells. Since 1924 it has produced almost 400 million barrels, and the California Department of Oil, Gas and Geothermal Resources (DOGGR) has estimated that there are about 30 million barrels remaining in the field's one thousand acres, recoverable with present technology.DOGGR 2010, p. 65 The field is operated by Sentinel Peak Resources, which acquired it in their purchase of Freeport McMoRan's onshore California oil and gas assets in 2016. Freeport McMoRan acquired it from Plains Exploration & Production in 2013. Surrounded by Los Angeles and its suburbs, and having over one million people living within five miles of its boundary, it is the largest urban oil field in the United Sta ...
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Rosecrans Oil Field
Rosecrans (a form of Rosenkranz) may refer to: People *Sylvester Horton Rosecrans (1827–1878), American Roman Catholic bishop *William Rosecrans (1819–1898), American army officer during the American Civil War Places *Rosecrans, Illinois, an unincorporated community *Rosecrans, Wisconsin, an unincorporated community Other Note: All of the below are direct or indirect namesakes of General William Rosecrans (see above). *Rosecrans Avenue, a major east-west highway in Los Angeles and Orange Counties, California *Rosecrans Hills, Los Angeles County, California *Rosecrans (LACMTA station), station on the Los Angeles County Metropolitan Transit Authority System *Fort Rosecrans National Cemetery, San Diego, California *Rosecrans Air National Guard Base, Saint Joseph, Missouri *Rosecrans Memorial Airport, Buchanan County, Missouri * Rosecrans (ship), a tanker lost off the mouth of the Columbia River, on January 14, 1913 -- see Coast Guard Station Point Adams * U.S.A.T. Rosecrans two ...
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Dominguez Oil Field
The Dominguez Oil Field is a large oil field underneath Dominguez Hills near Carson, California and the California State University, Dominguez Hills. It was a major oil producer from 1923 through 1960. Starting in 2010, oil companies became interested in redeveloping the field using modern extraction technologies. History Oil has been known in the Los Angeles basin since prehistoric times. The native inhabitants of the region used the tar for many purposes, including as a sealant, and the first European settlers found similar uses. In the mid-19th century, oil had become a valuable commodity as an energy source, commencing a period of exploration and discovery for its sources. By the 1890s, prospectors were drilling for oil in the basin, and in 1893 the first large field – the Los Angeles City Oil Field, adjacent and underneath the then-small city of Los Angeles – became the largest oil producer in the state. Oil companies began finding other rich fields not far away, su ...
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