____ are a type of lithostratigraphic unit with distinctive upper and lower boundaries.
A)Biozones
B)Stratotypes
C)Formations
D)Systems
E)Zones

Question

Quizplus · Accepted Answer

Formations are lithostratigraphic units that are characterized by distinctive upper and lower boundaries. They are usually defined by the lithology and/or fossil content of the rocks within them. Biozones and zones are subdivisions within formations, but they may not have distinctive upper and lower boundaries. Stratotypes are specific localities where a particular stratigraphic unit was first defined, and systems are global intervals of time defined by major changes in the fossil record.

____ Are a Type of Lithostratigraphic Unit with Distinctive Upper