For the block diagram below,what stratigraphic principle allowed you to determine the relative age of the intrusion and the stratigraphic sequence labeled 1?
A)principle of superposition
B)principle of faunal succession
C)principle of original horizontality
D)principle of cross-cutting relationships

Question

For the block diagram below,what stratigraphic principle allowed you to determine the relative age of the intrusion and the stratigraphic sequence labeled 1? 
A)principle of superposition 
B)principle of faunal succession 
C)principle of original horizontality 
D)principle of cross-cutting relationships

Quizplus · Accepted Answer

The principle of cross-cutting relationships states that any feature (such as an intrusion) that cuts across layers of rocks is younger than the layers it cuts through. Therefore, we can determine that the intrusion is younger than the stratigraphic sequence labeled 1 because it cuts across it. The other principles (superposition, faunal succession, and original horizontality) do not apply in this scenario.

For the Block Diagram Below,what Stratigraphic Principle Allowed You to Determine