Facies
Facies
In geology, a facies (pronounced variously as 'faysheez', 'fayseez' or 'fash-eeze'; plural also 'facies') is a body of rock with specified characteristics.[1]Ideally, a facies is a distinctive rock unit that forms under certain conditions of sedimentation, reflecting a particular process or environment.
The term facies was introduced by the Swiss geologist Amanz Gressly in 1838 and was part of his significant contribution to the foundations of modernstratigraphy,[2] which replaced the earlier notions of Neptunism