Vocabulary
Unconformities
Ages
Preservation
Random
100
The age, in years, of a rock or other object.
What is absolute age
100
Gaps in rock sequences
What is unconformities
100
An objects age in comparison to other things
What is relative age
100
The remains, imprints, or traces of prehistoric organisms
What is fossils
100
A scientist who studies fossils
What is paleontologist
200
Rock formed when sediments are cemented and compacted or when minerals are precipitated from solution.
What is sedimentary rock
200
The process of running water or glaciers removing rock layers by washing or scraping them away
What is unconformities developing
200
The process of breaking down isotopes
What is radioactive decay
200
Fossils in which the insides are filled with minerals from groundwater
What is permineralized remains
200
The remains of species that existed for a short period of time, were abundant, and were widespread geographically
What is index fossils
300
Time it takes for half of the atoms in isotope to decay
What is half-life
300
When horizontal layers of sedimentary rock are tilted and uplifted, then erosion wears down the rock layers
What is Angular Unconformities
300
Process of finding absolute age from half-life
What is radiometric dating
300
A cavity in the rock
What is mold
300
Says that in undisturbed layers of rock, the oldest rocks settle on the bottom and new rocks settle on the top
What is the Principle of Superposition
400
Earth Processes occurring today are similar to those in the past
What is uniformitarianism
400
When all the layers are parallel but yet there is still a gap
What is Disconformity
400
Atoms of the same element that have a different number of neutrons
What is isotopes
400
After sediment enters the mold, a _____ is formed
What is cast
400
Is where coal forms best
What is swampy regions
500
A silhouette of the original organism
What is carbon film
500
When metaphoric or igneous rocks are uplifted and them eroded
What is nonconformity
500
The oldest rock on Earth's age
What is 4.5 billion years
500
Tells you about how animals and other organisms lived
What is trace fossils
500
The process of matching rock layers from different regions
What is correlation
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