Which describes the difference between the law of inclusion and the law of crosscutting in relative dating of rocks and fossils?(1 point)
Responses
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.
Intruding objects are older in the law of inclusion.
Bottom layers of rock are older only in the law of crosscutting.
Intruding objects are younger in the law of inclusion.
Which law describes a layer of the Grand Canyon that is older than the layer above it?(1 point)
Responses
law of superposition
law of superposition
law of inclusion
law of inclusion
law of uniformitarianism
law of uniformitarianism
law of crosscutting
law of superposition
The law of inclusion and the law of crosscutting are two principles used in relative dating to determine the order of rock layers and fossils.
The law of inclusion states that in a sequence of sedimentary rocks, any rock fragments or inclusions found within a rock layer must be older than the rock layer itself. This is because the fragments or inclusions are assumed to have been present in the rock layer as it formed. So, if a rock layer contains fragments of another rock, the fragments must have formed before the layer they are found in.
On the other hand, the law of crosscutting states that any rock layers or features that cut across another rock layer must be younger than the rock layer they cut across. This principle applies to igneous intrusions, faults, and other geological features that have formed after the deposition of the surrounding rocks. Essentially, if something has disrupted or cut through a pre-existing rock layer, it must have happened after the layer was already there.
Based on these explanations, the correct statement is: Intruding objects are younger in the law of inclusion. This means that if an intrusion (such as an igneous rock) is found within a sequence of sedimentary rocks, the intrusion must have formed after the sedimentary rocks were already in place.