When to Use Facies?

Facies are used mostly to establish different units of rock from adjacent units within a contiguous body of rock by physical, chemical, or biological means.

Can facies be applied to time?

As a depositional environment shifts, so too must the sedimentary facies in any one location change. As time progresses, the positions of facies also progress laterally in space and time; hence, the laterally related environments become superimposed forming vertical successions.

What do you mean by facies?

In geology, a facies (/ˈfeɪʃiːz/ FAY-sheez; plural also facies) is a body of rock with specified characteristics, which can be any observable attribute of rocks (such as their overall appearance, composition, or condition of formation), and the changes that may occur in those attributes over a geographic area.