ABSTRACT
Sedimentology deals with the processes and products of sedimentation. Sediments are produced either by disintegration and alteration of preexisting rocks or by precipitation from solution. The particles ejected out of volcanoes and the dust particles of cosmic origin also add to the sediment mass of the earth in a limited way. Sediments are transported by running water, wind or moving ice to various depositions environments. The process of sediment transportation is often accompanied by the production of rhythmic bedforms or more complex structures which, when well preserved, provide clues to the palaeoenvironment and palaeocurrent.
