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Glacial outwash sand and gravel deposited during glacial retreat, Baumaris, Anglesey, Wales, UK, June.
01604026
Graham Eaton / Glacial outwash sand and gravel deposited during glacial retreat, Baumaris, Anglesey, Wales, UK, June.
Close-up of oil shale showing sedimentation lines. Used as a fuel. Western Colorado, USA
01320415
John Cancalosi / Close-up of oil shale showing sedimentation lines. Used as a fuel. Western Colorado, USA