Question

The correct hierarchy of the given stratigraphic units is

• A. Group > Member > Formation > Bed
• B. Eon > Era > Epoch > Period
• C. Group > Formation > Member > Bed
• D. Eon > Era > Series > Systems

Answer 1

The Correct Option is C

Step 1: Understanding the Stratigraphic Hierarchy 

Stratigraphic units are classified into a well-defined hierarchy based on their scale and importance in geological studies. The correct order is as follows:

• Group: The largest unit comprising several formations.
• Formation: A unit of rock with distinct lithological characteristics, subdivided into members.
• Member: A subdivision of a formation, often defined by unique lithological features.
• Bed: The smallest stratigraphic unit, representing a single layer of rock.

Step 2: Matching the Correct Hierarchy

The correct sequence is:

\[ \mathbf{Group > Formation > Member > Bed} \]

Final Answer:

Hence, the correct option is: (C).