A ________ is a geologic layer that is distinct enough to allow it to be found regionally and used to correlate rocks.
A)marker bed
B)geologic contact
C)stratigraphic bed
D)disconformity

Question

Quizplus · Accepted Answer

A marker bed is a geologic layer that is distinct enough to serve as a reference point or guide fossil, allowing it to be correlated and identified regionally. It is often used as a tool for determining the relative age of rock formations. Geologic contacts are boundaries between different rock types or layers, while stratigraphic beds are layers of sedimentary rock arranged in a specific sequence. Disconformities are gaps in the geologic record where there is a break in sedimentation. While all of these terms are important in stratigraphy, only the marker bed is specifically used as a correlation tool.

A ________ Is a Geologic Layer That Is Distinct Enough