Question

Which of the following systems tract(s) indicate regression?

• A. Transgressive systems tract
• B. Falling stage systems tract
• C. Highstand systems tract
• D. Lowstand systems tract

Hint:

Regression is associated with a falling sea level and the retreat of shorelines. In geological systems tracts, the Falling stage, Highstand, and Lowstand tracts indicate different stages of regression.

Answer 1

The Correct Option is B, C, D

In geological terms, regression refers to the process where sea level falls, exposing more of the land. This results in the retreat of the shoreline. The following systems tracts indicate regression:
- The Falling stage systems tract is associated with a falling sea level, indicating regression. Hence, option (B) is correct.
- The Highstand systems tract occurs when the sea level is high and stable, but as the sea level begins to fall, it can also indicate regression. Hence, option (C) is correct.
- The Lowstand systems tract refers to the lowest point in the sea level during regression, thus indicating the maximum extent of regression. Hence, option (D) is correct.
Thus, the correct answer is (B), (C), and (D).