Which describes the difference between the law of inclusion and the law of crosscutting in relative dating of rocks and fossils?(1 point)

Question

Responses

Bottom layers of rock are older only in the law of crosscutting.
Bottom layers of rock are older only in the law of crosscutting.

Bottom layers of rock are younger only in the law of crosscutting.
Bottom layers of rock are younger only in the law of crosscutting.

Intruding objects are younger in the law of inclusion.
Intruding objects are younger in the law of inclusion.

Intruding objects are older in the law of inclusion.

Answer 1

The correct response is:

Intruding objects are younger in the law of inclusion.

To explain further:

• The law of inclusion states that any rock fragments that are included in a rock must be older than the rock that contains them. Thus, the inclusions are older than the surrounding material.

• The law of crosscutting relationships states that a rock or fault that cuts through other rocks is younger than the rocks it cuts through.

So, the statement about intruding objects being younger in the law of inclusion is accurate, while the other statements about the relative ages of the layers are not correctly representing the laws.

Answer 2

Which law describes a layer of the Grand Canyon that is older than the layer above it?(1 point)
Responses

law of uniformitarianism
law of uniformitarianism

law of superposition
law of superposition

law of inclusion
law of inclusion

law of crosscutting

Answer 3

The correct response is:

law of superposition

The law of superposition states that in an undisturbed sequence of sedimentary rocks, the oldest layers are at the bottom, and the younger layers are at the top. Thus, a layer of rock that is older than the layer above it is described by the law of superposition.