SEDIMENTARY

ROCKS, « term used}! geology to denote formations that have | * en deposited under water. Stratifica- |” on is a mark of this type of rock, and/|* nong surface markings it is not uncom- | % on to find rain marks, ripples, spoors, | ¢ acks and burrows, the relics of a time |‘ hen the deposit was in a soft state by |< e margin of the water. Sandstones, |‘ nzlomerates, shales, clays and mudstones |! long to the sedimentary cla . ‘ [s. 274]