Question

Barry is applying the principles of relative dating to a building that has been constructed. Analyzing a section of the building, Barry
says that the lowest part of the section must have been constructed


the parts above it were constructed. He


bases this conclusion on the principle of


. Also, looking at a crack forming in the building wall, he says


that the crack must be


the wall. Barry used the principle of


to arrive at this


conclusion.


Reset


Next


2010


11

Answer 1

Answer:

Principle of Superposition and Principle of Cross-cutting relationship

Explanation:

According to the law of superposition, the rock layers that are present at the base of a rock sequence are the oldest rocks as they were deposited a long time back, and those layers that are present at the apex are the youngest rocks and were deposited recently.

According to the law of cross-cutting relationships, the geological features (igneous intrusive bodies) such as d(i)kes, sills, batholiths, laccoliths, lopoliths are younger than the rocks that are being cut. This provides the relative age of the features.

In the given condition, as Bary says that the lowest portion of the building is constructed earlier than the upper portion, he refers to the principle of superposition.

And when he says about the cracks that are formed in the walls, he referred to the principle of cross-cutting relationship.