rock terms

5. the state of eroding; state of being eroded
6. a fine-grained rock formed by the metamorphosis of clay, shale, etc., that tends to split along parallel cleavage planes, usually at an angle to the planes of stratification
7. a volcanic glass similar in composition to granite, usually dark but transparent in thin pieces, and having a good conchoidal fracture
9. the state of a body perceived as having or generating a relatively high degree of warmth.
11. the exertion of force upon a surface by an object, fluid, etc., in contact with it:
12. the matter that settles to the bottom of a liquid
13. the study of rocks
16. pertaining to or characterized by change of form, or metamorphosis.
17. a stone of any size.
18. a clear, transparent mineral or glass resembling ice.

1. Geology. produced under conditions involving intense heat, as rocks of volcanic origin or rocks crystallized from molten magma.
2. any remains, impression, or trace of a living thing of a former geologic age, as a skeleton, footprint, etc.
3. a rock that is made up from feldspar, quartz and mica
4. a substance obtained by mining, as ore
6. a rock of fissile or laminated structure formed by the consolidation of clay or argillaceous materials
8. Geology. formed by the deposition of sediment, as certain rocks.
10. a person who studies the science of rocks
14. a metamorphic rock, generally made up of bands that differ in colour and composition, some bands being rich in feldspar and quartz, others rich in hornblende or mica.
15. Geology. a continuous process by which rocks are created, changed from one form to another, destroyed, and then formed again.