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States that the oldest rocks lie on the bottom and the youngest rocks are on top of any undisturbed sequence of sedimentary rocks.
Petrified Fossil
Intrusion
Law of Superposition
Mass Extinction
Unconformity
Index Fossil
Trace Fossil
Relative Age
A type of fossil that provides evidence of the activity of ancient organisms.
Petrified Fossil
Intrusion
Law of Superposition
Mass Extinction
Unconformity
Index Fossil
Trace Fossil
Relative Age
Gaps in the rock record.
Petrified Fossil
Intrusion
Law of Superposition
Mass Extinction
Unconformity
Index Fossil
Trace Fossil
Relative Age
An igneous rock layer formed when magma hardens beneath Earth’s surface.
Petrified Fossil
Intrusion
Law of Superposition
Mass Extinction
Unconformity
Index Fossil
Trace Fossil
Relative Age
A fossil in which minerals replace all or part of an organism
Petrified Fossil
Intrusion
Law of Superposition
Mass Extinction
Unconformity
Index Fossil
Trace Fossil
Relative Age
Found in a narrow time range but widely distributed around the earth.
Petrified Fossil
Intrusion
Law of Superposition
Mass Extinction
Unconformity
Index Fossil
Trace Fossil
Relative Age
Occurs when a large proportion of the earth’s species go extinct in a relatively short period of time.
Petrified Fossil
Intrusion
Law of Superposition
Mass Extinction
Unconformity
Index Fossil
Trace Fossil
Relative Age
Uses information about rock layers and the fossil record to determine the age relationships between rocks.
Petrified Fossil
Intrusion
Law of Superposition
Mass Extinction
Unconformity
Index Fossil
Trace Fossil
Relative Age
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