Question

Arrange the following in older to younger order of their stratigraphic position:
A. Otoceras zone,
B. Megalodon limestone,
C. Daonella Limestone,
D. Monotis shale, E. Hedenstroemia be
D. Choose the correct answer from the options given below:

• A. A, B, D, C, E
• B. A, E, C, D, B
• C. B, D, C, A, E
• D. C, B, A, E, D

Hint:

In stratigraphy, older to younger order means moving upward in the geological sequence.

Answer 1

The Correct Option is B

Concept:
Stratigraphic position is arranged from older beds at the bottom to younger beds above.

Step 1: Identify the oldest zone.
Otoceras zone is the oldest among the given stratigraphic units. \[ \text{Oldest}=A \]

Step 2: Identify the next bed.
Hedenstroemia bed comes after Otoceras zone. \[ \text{Second}=E \]

Step 3: Identify middle units.
Daonella Limestone is followed by Monotis shale. \[ C>D \]

Step 4: Identify the youngest unit.
Megalodon limestone is the youngest among the given units. \[ \text{Youngest}=B \] Therefore, the older to younger sequence is: \[ A>E>C>D>B \] \[ \therefore \text{Correct Answer is (B)} \]