A(n) ___ is a body of rock of considerable thickness that is large enough to be mappable and with characteristics that distinguish it from adjacent rocks.
A) layer
B) bed
C) blanket
D) formation
E) epoch

Question

Quizplus · Accepted Answer

A formation is defined as a body of rock that is thick enough to be mapped and has distinct characteristics that differentiate it from the surrounding rocks. Layers, beds, and blankets also refer to rock bodies, but do not have the same specific criteria for mapping and distinct characteristics as formations. Epochs refer to a subdivision of the geologic timescale, and not a specific rock body.

A(n) ___ Is a Body of Rock of Considerable Thickness