sediment definition geology
sedimentation in Geology topic. From Longman Dictionary of Contemporary Englishsedimentationsedâ§iâ§menâ§taâ§tion /ËsedÉmenËteÉªÊÉn, -mÉn-/ noun [uncountable] technical HEGthe natural process by which small pieces of rock, earth etc settle at the bottom of the sea etc and form a solid layer.