A _____ is a layer of sedimentary rock with a vertical change in particle size, usually from coarse at the bottom to fine at the top.
A) patterned bed
B) cross bed
C) sorted bed
D) graded bed
E) schist

Question

Quizplus · Accepted Answer

A graded bed is a layer of sedimentary rock with a vertical change in particle size, usually from coarse at the bottom to fine at the top. This is caused by a decrease in energy of the water or wind carrying the sediment, leading to the larger particles settling first and the smaller particles settling later on top.

A _____ Is a Layer of Sedimentary Rock with a Vertical