Question

a student claims that a rock layer which appears to be tilted at a $45^0$ angle formed at a $0^0$ (flat). which of the geologic principals backs up the student’s claim

• super position
• original horizontality
• faunal succession
• cross cutting relationships

Explanation:

The principle of Original Horizontality states that sedimentary rock layers are originally deposited horizontally (at \(0^\circ\)) and later geological processes can tilt them (to \(45^\circ\) in this case). Superposition is about the order of rock layers, Faunal Succession is about fossil sequences, and Cross - Cutting Relationships is about the age of features that cut through rocks. So Original Horizontality supports the student's claim.

Answer:

B. Original Horizontality