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Oil shale formation takes place in a number of depositional settings and has considerable compositional variation. Oil shales can be classified by their composition (carbonate minerals such as calcite or detrital minerals such as quartz and clays) or by their depositional environment (large lakes, shallow marine, and lagoon/small lake settings).
Outcrop of Ordovician kukersite oil shale, northern Estonia Lower Jurassic oil shale near Holzmaden, Germany. Oil shale geology is a branch of geologic sciences which studies the formation and composition of oil shales–fine-grained sedimentary rocks containing significant amounts of kerogen, and belonging to the group of sapropel fuels. [1]
Different estimates may or may not include oil shale, mined oil sands or natural gas liquids. Because proven reserves include oil recoverable under current economic conditions, nations may see large increases in proven reserves when known, but previously uneconomic deposits become economic to develop.
The species epithet of the "Eisleben Shale Fish", or "Kupferschiefer Herring" refers to Johann Karl Freiesleben, the Berghauptmann (mining inspection director) of Saxony. [41] Other fish found in the Kupferschiefer include Coelacanthus granulatus , Hopleacanthus richelsdorfensis , Acentrophorus glaphyurus , Menaspis armata , Muensterichthys ...
The "classic" GeoGuessr game mode consists of five rounds, each displaying a different street view location for the player to guess on a map. The player then receives a score of up to 5,000 points depending on how accurate their guess was, up to 25,000 points for a perfect game.
Shale gas is an unconventional natural gas produced from shale, a type of sedimentary rock.Shale gas has become an increasingly important source of natural gas in the United States over the past decade, and interest has spread to potential gas shales in Canada, Europe, Asia, and Australia.
Larger map shows the locations of Messel primates 1–7 (Table 1) within the Messel oil shale excavation. The current surface of the Messel pit is roughly 60 m (200 ft) below the local land and is about 0.7 km 2 (0.27 sq mi) in area. The oil-shale bed originally extended to a depth of 190 m (620 ft).
Oil shale and limestone deposits, along with forests which cover 47% of the land, play key economic roles in this generally resource-poor country. Estonia boasts over 1,500 lakes , numerous bogs , and 3,794 kilometers of coastline marked by numerous bays, straits, and inlets.