click below
click below
Normal Size Small Size show me how
Relative Dating
8th Earth Science
Question | Answer |
---|---|
Determining whether an object or event is older or younger than other objects/events is called ? | relative dating |
The trace or remains of an organism that lived long ago, most commonly preserved in sedimentary rock. | fossil |
The history of life in the geologic past as indicated by the traces or remains of living things. | fossil record |
An ordered arrangement of rock layers that is based on the relative ages of the rocks and in which the older rocks are at the bottom. | geologic column |
A principle of geology that states that younger rock lie above older rocks if the layers have not been disturbed. | Law of Superposition |
A principle of geology that states that the geologic feature which cuts another is the younger of the two features. | Law of cross-cutting relationships |
A type of rock disturbance when rock layers move up or down unevenly, and they become slanted. | tilting |
A type of rock disturbance when rock layers bend and squeeze together. | folding |
A type of rock disturbance when there is a break or crack in Earth's crust where rocks can move. | fault |
A type of rock disturbance when magma move into rock layers, where it cools and hardens forming igneous rock. | intrusion |
When a rock layer is missing due to erosion or sediments not depositing for a long period of time. | unconformity |
A principle that geologic processes that occurred in the past can be explained by the current geologic processes. | uniformitarianism |