We do not make due allowance for the enormous intervals of time which have elapsed between our consecutive formations, longer perhaps in many cases than the time required for the accumulation of each formation.
It is not too much to say that the character and thickness of each formation of the stratified rocks depend primarily on these crustal movements.
Each formation is thus a separate local chapter in the geological history of the earth, and its strata are its leaves.
The fossils of each formation differ on the whole from those of every other.
The above list will hopefully provide you with a few useful examples demonstrating the appropriate usage of "each formation" in a variety of sentences. We hope that you will now be able to make sentences using this group of words.
