Geology Terms

3. a longitudinal earthquake wave that travels through the interior of the earth and is usually the first conspicuous wave to be recorded by a seismograph.
5. hot molten or semifluid rock erupted from a volcano or fissure, or solid rock resulting from cooling of this:
7. A vent in Earth's surface through which molten rock and gases escape
8. a fault in which rock strata are displaced mainly in a horizontal direction, parallel to the line of the fault.
9. hot fluid or semifluid material below or within the earth's crust from which lava and other igneous rock is formed on cooling
10. Tectonics a theory explaining the structure of the earth's crust and many associated phenomena as resulting from the interaction of rigid lithospheric plates which move slowly over the underlying mantle

1. a transverse earthquake wave that travels through the interior of the earth and is usually the second conspicuous wave to reach a seismograph.
2. an elastic wave in the earth produced by an earthquake or other means.
4. a fault in which the hanging wall moves down relative to the footwall
6. a sudden and violent shaking of the ground, sometimes causing great destruction, as a result of movements within the earth's crust or volcanic action.