Question

Match the features in Column 1 to the most appropriate description in Column 2.

• A. P-iii; Q-i; R-iv; S-ii
• B. P-i; Q-iii; R-ii; S-ii
• C. P-iii; Q-i; R-ii; S-iv
• D. P-iii; Q-iv; R-i; S-ii

Hint:

Graded bedding forms part of turbidite sequences, while hiatuses represent gaps in the fossil record, and soil profiles indicate subaerial conditions.

Answer 1

The Correct Option is A

Step 1: Match the ash layer.
A volcanic ash layer drops in a moment of geological time and can be dated precisely. So P, the ash layer, pairs with dating of sedimentary rocks (iii).

Step 2: Match graded bedding.
Graded bedding, coarse at the base and fine on top, is the mark of a turbidite flow. So Q pairs with part of a turbidite sequence (i).

Step 3: Match the hiatus.
A hiatus is a break where no sediment was laid down, so fossil zones go missing. So R pairs with a missing faunal zone (iv).

Step 4: Match the soil profile.
A buried soil profile shows the land was exposed to air for a while. So S pairs with a subaerial episode (ii).

Step 5: Combine.
The full match is P-iii, Q-i, R-iv, S-ii.
\[ \boxed{\text{P-iii; Q-i; R-iv; S-ii}} \]