Question

Choose the CORRECT statement(s) out of the following.

• A. Shoreline shifts landward during transgression.
• B. Shoreline shifts seaward during transgression.
• C. Delta deposits preserve the record of transgression.
• D. Incised river valley forms because of transgression.

Hint:

Transgression = Landward shift; Regression = Seaward shift.

Answer 1

The Correct Option is A

Step 1: Understanding transgression and regression.
- Marine transgression: Rise in sea level causes shoreline to migrate landward, depositing finer sediments over coarser ones.
- Regression: Fall in sea level causes seaward migration of shoreline.
Step 2: Evaluating statements.
(A) True — Transgression = landward shift of shoreline.
(B) False — Seaward shift occurs during regression.
(C) True — Deltaic sequences record transgressive–regressive cycles.
(D) False — Incised valleys form during regression, not transgression.
Step 3: Conclusion.
Correct statements are (A) and (C).