BSRG Photo Archive
Coal seam split. The white sandstones in the cliff are marine shoreface parasequences. The coal was deposited in a raised coastal mire. A rise in sea-level flooded the margin of the mire and resulted in shallow marine deposition. Subsequent coal formation over the top of the sandstone created a coal split. The cliff in the upper part of the photo is a series of coal bearing coastal plain deposits overlain by a coarse grained fluvial sandstone. From the Book Cliffs of eastern Utah.
photo by John Howell