| A | B |
|---|
| horizontal | The position of rock layers when they are originally laid down. |
| superposition | Rule that states that the oldest rock layers are found at the bottom. |
| bottom | Location on a cliff where the oldest rock layers are found. |
| strata | Another name for rock layers. |
| overturned fold | Type of fold that can cause younger rocks to be BELOW older rocks. |
| overthrust fault | Type of fault that slides older rocks ON TOP OF younger rocks. |
| intrusion | Forms when molten rock invades pre-existing rock. |
| contact metamorphism | Found along the edge of igneous intrusions. |
| fossil | Any evidence of pre-historic life. |
| magma | Molten rock beneath the Earth's surface. |
| lava | Molten rock on the Earth's surface. |
| fault | A crack in the rock along which motion has taken place. |
| sediments | Always are older than the rocks that they are found in. |
| vein | A mineral deposit within rock layers. |
| erosional surface | Shown by a wavy line between rock layers. |
