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Panoramic view of a room-and-pillar oil shale mine in northeastern Estonia. The thickness of the mined oil shale (kukersite) is about 2.5 meters. Oil shale is also mined by open pit at several nearby localities. -- Photo taken in 2005 courtesy of Heikki Bauert, Tallinn, Estonia
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Panoramic view of a room-and-pillar oil shale mine in northeastern Estonia. The thickness of the mined oil shale (kukersite) is about 2.5 meters. Oil shale is also mined by open pit at several nearby localities. -- Photo taken in 2005 courtesy of Heikki Bauert, Tallinn, Estonia