- A geological formation, or simply formation, is a body of rock having a consistent set of physical characteristics (lithology) that distinguishes it from adjacent bodies of rock, and which occupies a particular position in the layers of rock exposed in a geographical region (the stratigraphic column). It is the fundamental unit of lithostratigraphy, the study of strata or rock layers.
When he sawe many of ye Pharises and of ye Saduces come to hys baptim he sayde vnto the: O generacio of vipers who hath taught you to fle fro the vengeauce to come?
Matthew 3:7 TYN