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Interpreting

Geologic History 1

TermDefinition
Theory Evolution Idea that organisms change over time into amore complex form
Intrusion When Magma squeezes up into solid rock
Marker Beds Sedimentary rock layers that are easily identified and found in other locations which aid in correlation
Extinct Plant or organism that no longer exists
Out Gassing Gasses that are given off from volcanoes
Radioactive Dating Using an unstable element's rate of decay to calculate the age of a rock or fossil
Contact Metamorphism Changing of the rock structure from extreme heat due to an igneous intrusion
Index Fossils Organic remains from a something that was widespread but the species lived for a short period of time.
Correlation Finding two separate rocks are the same age using fossils, rock type or age
Unconformity Buried erosional surface: rocks missing from erosion and then buried by other rocks.
Created by: sjjwhite
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