Law of Superposition Worksheet
Explore the Law of Superposition, a fundamental principle in geology for determining the relative ages of rock layers and the fossils within them.
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Law of Superposition
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Read each question carefully and answer to the best of your ability. Refer to the diagram of rock layers when necessary.
Observe the diagram of sedimentary rock layers below. Each layer represents a different period in Earth's history.
1. According to the Law of Superposition, which rock layer is the oldest?
2. Which rock layer is the youngest?
Complete the following sentences using your knowledge of the Law of Superposition.
1. The Law of Superposition states that in an undisturbed sequence of sedimentary rock layers, the oldest layers are at the and the youngest layers are at the .
2. Fossils found in lower rock layers are generally than fossils found in higher rock layers.
3. This principle is crucial for determining the age of rock layers.
Indicate whether each statement is True or False.
1. The Law of Superposition applies to all types of rocks.
True
False
2. Intrusions and faults can sometimes complicate the application of the Law of Superposition.
True
False
Choose the best answer for each question.
1. What does an unconformity represent in a sequence of rock layers?
A period of continuous deposition
A gap in the geologic record due to erosion or non-deposition
The youngest rock layer in a sequence
The oldest rock layer in a sequence
1. Explain how the Law of Superposition helps paleontologists understand the history of life on Earth.
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