Vocabulary
Vocabulary & Stuff
Unconformity
100
The age of rocks and geologic features compared with other rocks and features nearby
What is relative age?
100
Represent species that existed on Earth for a short length of time, were abundant, and inhabited many locations.
What is index fossils?
100
The three types of unconformities covered in class.
What is unconformity, angular unconformity, and nonconformity?
200
The principal that in undisturbed rock layers, the oldest rocks are on the bottom.
What is superposition?
200
The principle of relative age dating pictured in the image below.
What is original horizontality?
200
Pictured below, younger sedimentary layers are deposited on top of older, horizontal sedimentary layers that have been eroded.
What is disconformity?
300
A piece of an older rock that becomes part of a new rock.
What is inclusion?
300
As pictured in the image below, sediments are deposited in large, continuous sheets in all lateral directions.
What is lateral continuity?
300
Pictured below, sedimentary layers are deposited on top of tilted or folded sedimentary layers that have been eroded
What is angular unconformity?
400
A surface where rock has eroded away, producing a break or gap, in the rock record.
What is unconformity?
400
This picture shows which principle of relative aging.
What is inclusions?
400
Pictured below, younger sedimentary layers are deposited on older igneous or metamorphic rock layers that have been eroded
What is nonconformity?
500
Matching rocks and fossils from separate locations.
What is correlation?
500
In the picture below, principle of relative age dating one geologic feature (fault or dike) cuts across another feature, the feature that IT cuts across is older.
What is cross-cutting relationships?
500
These are used to help geologist to make correlations in relative rock aging.
What are index fossils?