CH 27.4 Flashcards
1
Q
absolute dating
A
the process of assigning an exact numerical age to an organism, an object, or event.
2
Q
relative dating
A
the process of placing objects or events in their proper order in time
3
Q
uniformitarianism
A
states that the laws of nature operate today as they have in the past
4
Q
principle of superposition
A
states that in an undisturbed sequence of sedimentary rock layers, the youngest rocks will be at the top and the oldest rocks will be at the bottom
5
Q
uncomformity
A
gaps in the rock record during which either erosion occurred or deposition was absent
6
Q
fossils
A
the remains or traces of organisms found in the geologic rock record
