relative dating Flashcards
what is relative dating
Is a process that lets us look at geological events or fossils and put them in order from youngest to oldest, determining the age of a rock or event in relation to other rocks or events.
what is the law of superposition
Is a law that states that is a sequence of undisturbed rocks, the oldest layer is on the bottom and the youngest is on the top
Law of Original Horizontality
Is the law that states that sediment layers are deposited horizontally
Index Fossils
; fossils that help us date the age and order of rocks
Law of Cross-Cutting Relationships
intrusions and extrusions are always younger than the rocks they cut through
Uniformitarianism
;s a rule that states that what happened before is still happening today and vice versa .
Fault
a fracture or zone of fractures between two blocks of rock