Quizlet relative age dating. Geologic Time: Relative Age Dating.



Quizlet relative age dating

Quizlet relative age dating

States that geologic processes in the past can be explained by current geologic processes. Law of superposition The principle that states that younger rocks lie above older rocks if the layers have not been disturbed. If sedimentary rock layers are not horizontal then what has happened? Something has disturbed them after they were formed. What can disturb rock layers so much that they place older layers on top of younger layers?

Forces in the earth, such as tilting, folding, faults, and intrusions. When the earth's forces move rock layers up or down unevenly, so that the layers are slanted. Tilting The bending of rocks when rock layers are squeezed sideways. Folding A break or crack in the Earth's crust along which rocks shift position. Fault A mass of igneous rock that forms when magma is injected rock and then cools Intrusion Unconformity A gap in the geologic rock record that forms when rock layers are eroded or when sediment is not deposited for a long time.

What are the processes that can disturb sedimentary rock layers? Nonconformity, diconformity, angular unconformity Law of crosscutting States that a fault or a body of rock, such as an intrusion, must be younger than any feature or layer or rock that the fault or rock body cuts through.

How can Scientists establish the relative ages of rocks? By using fossils in undisturbed sequence of rocks. Correlation A standard method used by earth scientists to obtain the relative ages of rock layers.

Geologic Column An ordered arrangement of rock layers that is based on the relative ages of the rocks, with the oldest rocks at the bottom.

If two layers match, then they are likely to be what at the same time? Determining the age of an event or object in years. How do scientists determine the absolute age of rocks? Radioactive isotopes Atoms of the same element that have a different number of neutrons. Radioactive decay The breakdown of a radioactive isotope into a stable isotope of the same element or of another element.

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Relative Dating of Rock Layers



Quizlet relative age dating

States that geologic processes in the past can be explained by current geologic processes. Law of superposition The principle that states that younger rocks lie above older rocks if the layers have not been disturbed. If sedimentary rock layers are not horizontal then what has happened? Something has disturbed them after they were formed. What can disturb rock layers so much that they place older layers on top of younger layers? Forces in the earth, such as tilting, folding, faults, and intrusions.

When the earth's forces move rock layers up or down unevenly, so that the layers are slanted. Tilting The bending of rocks when rock layers are squeezed sideways. Folding A break or crack in the Earth's crust along which rocks shift position. Fault A mass of igneous rock that forms when magma is injected rock and then cools Intrusion Unconformity A gap in the geologic rock record that forms when rock layers are eroded or when sediment is not deposited for a long time.

What are the processes that can disturb sedimentary rock layers? Nonconformity, diconformity, angular unconformity Law of crosscutting States that a fault or a body of rock, such as an intrusion, must be younger than any feature or layer or rock that the fault or rock body cuts through. How can Scientists establish the relative ages of rocks? By using fossils in undisturbed sequence of rocks.

Correlation A standard method used by earth scientists to obtain the relative ages of rock layers. Geologic Column An ordered arrangement of rock layers that is based on the relative ages of the rocks, with the oldest rocks at the bottom. If two layers match, then they are likely to be what at the same time? Determining the age of an event or object in years. How do scientists determine the absolute age of rocks? Radioactive isotopes Atoms of the same element that have a different number of neutrons.

Radioactive decay The breakdown of a radioactive isotope into a stable isotope of the same element or of another element.

Quizlet relative age dating

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5 Comments

  1. Law of superposition The principle that states that younger rocks lie above older rocks if the layers have not been disturbed.

  2. A change in the texture, structure, or chemical composition of a rock due to extreme heating but not extreme enough to fully melt the country rock.

  3. This type of stress forms faulted and folded mountains at convergent boundaries. A change in the texture, structure, or chemical composition of a rock due to extreme heating but not extreme enough to fully melt the country rock. What can disturb rock layers so much that they place older layers on top of younger layers?

  4. What are the processes that can disturb sedimentary rock layers? Nonconformity, diconformity, angular unconformity Law of crosscutting States that a fault or a body of rock, such as an intrusion, must be younger than any feature or layer or rock that the fault or rock body cuts through.

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