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Geol. Ev. Review

Geologic Evolution

This principle states that younger rocks lie above older rocks as long as the rock layers have not been disturbed. Law of Superposition
Determining whether how old or young a rock layer is "relatively" to the rock layers around it. Relative Dating
A surface that represents a missing part of a rock layer sequence. Unconformity
Any method of measuring the age of an event or object in years. Absolute Dating
The remains or physical evidence of an organism preserved by geologic processes. Fossil
A scale that accounts for the Earth's entire history divided into distinct intervals of time. Geologic Time
When molten rock from the Earth's Interior squeezes into existing rock and cools. Intrusion
A crack or break in the Earth's crust. Fault
When rock layers bend and buckle from Earth's internal forces. Folding
When rock layers slant due to internal forces inside Earth. Tilting
Fossils that are wide-spread, have distinct characteristics, and lived for a relatively short geologic time span. Index fossil
The hypothesis that states that continents once formed a single landmass, broke up, and drifted to their present locations. Continental Drift
This process creates new oceanic lithosphere at mid-ocean ridges. Seafloor Spreading
Where plate boundaries collide. Convergent Boundaries
Where plate boundaries slide past each other horizontally. Transform Boundary
The type of plate boundaries that exists where seafloor spreading occurs. Divergent Boundary
Satellite systems used to measure plate tectonic activity. GPS
The principle that states that past geologic processes which shape the Earth have been at work throughout Earth's history. Uniformitarianism
The principle that states that all geologic change occurs suddenly. Catastrophism
Any naturally preserved evidence of animal activity. Trace Fossil
Death of every member of a species. Extinction
Cylinders of ice that obtains trapped gases from the atmosphere and is used to study Earth's past climate. Ice cores
Created by: tiffany.green