Question

Which one of the following cross-stratifications provides the paleocurrent direction on the truncated bedding surface of an undeformed cross-stratified sedimentary strata?

• A. Tabular
• B. Hummocky
• C. Trough
• D. Herringbone

Hint:

Trough cross-stratification is useful in determining paleocurrent directions, especially in environments with oscillating or meandering flows.

Answer 1

The Correct Option is C

Cross-stratifications are often used to interpret the paleocurrent direction in sedimentary rocks. The different types of cross-stratification structures provide different information about past depositional environments.
Step 1: Trough Cross-Stratification
Trough cross-stratification is characterized by the presence of curved layers, typically formed by currents that are variable in direction. This structure provides clear evidence of the paleocurrent direction on the truncated bedding surface. Therefore, option (C) is the correct answer.
Final Answer:
\[ \boxed{(C)} \]