Relative Dating Stratification Assignment
Flashcard
•
Science, Geography, Biology
•
9th - 10th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is relative dating?
Back
Relative dating is a method used to determine the age of rocks and fossils in relation to one another, without determining their exact age.
2.
FLASHCARD QUESTION
Front
What is the law of superposition?
Back
The law of superposition states that in undisturbed sedimentary rock layers, the oldest layers are at the bottom and the youngest layers are at the top.
3.
FLASHCARD QUESTION
Front
What is an unconformity?
Back
An unconformity is a surface that represents a gap in the geological record, where rock layers have been eroded or not deposited for a period of time.
4.
FLASHCARD QUESTION
Front
What are index fossils?
Back
Index fossils are fossils of organisms that were widespread but only existed for a short period of geological time, used to date and correlate the age of rock layers.
5.
FLASHCARD QUESTION
Front
What is a nonconformity?
Back
A nonconformity is a type of unconformity where sedimentary rocks are deposited on top of eroded igneous or metamorphic rocks.
6.
FLASHCARD QUESTION
Front
What is a disconformity?
Back
A disconformity is a type of unconformity where layers of sedimentary rock are separated by a period of erosion or non-deposition, but both layers are sedimentary.
7.
FLASHCARD QUESTION
Front
What is an angular unconformity?
Back
An angular unconformity occurs when tilted or folded sedimentary rocks are overlain by younger, more horizontal layers.
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