Relative Time Flashcards
1
Q
What is the Law of Superposition?
A
In an undisturbed sequence of layers, the oldest layer will always be at the bottom.
2
Q
What is the Cross-Cutting Law?
A
Any feature that cuts across a body of sediments is younger than the body of sediment or rock that it cuts across.
REMEMBER! THE CUCUMBER CAME BEFORE THE KNIFE :D
3
Q
Define fracture
A
A crack in the rock.
4
Q
Define fault.
A
A fracture along which movement has occured.
5
Q
What is the Law of Inclusions?
A
If one rock body contains fragments or another rock body, it must be younger than the fragments or rock it contains.
Basically: The inclusions are older than the rocks that contains them.
6
Q
Define dike.
A
A rock wall.
7
Q
Define sill.
A
A horizontal dike.
