Across
- 3. a texture of metamorphic rocks that gives the rock a layered appearance.
- 6. parallel layers in sedimentary rocks.
- 8. relates to large-scale mountain-building processes.
- 10. when material precipitates from water which causes open spaces to be filled. Particles join into a solid mass.
- 12. texture that results from the consolidation of individual rock fragments which are ejected during a volcanic eruption.
- 15. a sedimentary rock which is composed of lithified angular fragments.
- 19. an igneous rock with porphyritic texture that has a large crystal embedded in a matrix of finer-grained crystals called the groundmass.
- 23. metamorphic rocks that do not have a layered appearance.
- 24. the most common sedimentary rock which consists of silt and clay-size particles.
- 28. a fine grained igneous rock of magic composition
- 29. a fine-grained rock igneous rock which is composed of light color silicates.
- 31. when the crystals are roughly equal in size and large enough that individual minerals can be identified by the unaided eye.
- 32. a sedimentary rock which is composed of small rounded particles.
- 35. a coarse rock which is composed of loose shells and shell fragments.
- 36. a type of lithification where the weight of overlying material compresses deeply buried sediment.
- 39. used as a building material.
- 40. a metamorphic rock which contains fine crystals of muscovite, chlorite, or both.
- 42. igneous rock that forms when magma solidifies at Earth’s surface.
- 47. the settling of early formed minerals during the crystallization of magma.
- 50. indicates that a rock is formed from light color silicates.
- 52. medium, to coarse, grained metamorphic rocks which granular and elongated minerals dominate.
- 54. a fine-grained igneous rock which has a mafic composition.
- 55. the process of forming more than one rock type from a single magma.
- 58. changes in a rock caused by the heat from nearby magma.
- 59. a fine-grained sedimentary rock which consists of silt-sizes grains mixed with clay-size grains.
- 60. rock particles and dissolved substances which are created by the weathering of rocks.
Down
- 1. sediment that is formed when material is dissolved in water. Shells are an example.
- 2. igneous rock that forms when magma solidifies beneath Earth’s surface.
- 4. indicates that a rock contains dark silicate minerals and calcium-rich plagioclase feldspar.
- 5. a durable detrital sedimentary rock that consists of sand-size grains.
- 7. the remains of organisms which are preserved from the geologic past.
- 9. a sedimentary rock which consists of organic matter. Used as a fossil fuel.
- 11. pressure that is applied in all directions
- 13. the process by which a sediment converts into a rock.
- 14. when crystals are too small for individual minerals to be distinguished with the unaided eye.
- 16. a group of igneous rocks that contains 25 percent dark silicate minerals.
- 17. a texture which consists of large crystals embedded in small crystals.
- 18. a chemical sedimentary rock which is composed of calcite.
- 20. igneous rocks that contain no crystals.
- 21. a sedimentary rock formed by material deposited by evaporation of water.
- 22. the size, shape, and distribution of the particles that form a rock.
- 25. dissolved particles and minerals that are compacted into a rock through lithification.
- 26. a hard, nonfoliated metamorphic rock which is formed from quartz sandstone.
- 27. sedimentary rocks which are formed by erosion and organic activity.
- 30. magma that reaches earth’s surface
- 33. a dark-green to black intrusive igneous rock which is made up of dark silicates.
- 34. formed from the accumulation of material that came from weathered rocks.
- 37. a form of limestone which is deposited by hot springs or as a cave deposit.
- 38. illustrates the relationships between magma and minerals crystallizing from it during the formation of igneous rocks.
- 41. igneous rocks that contain small cavities called vesicles.
- 43. the changes in mineral composition and texture of a rock which is exposed to high temperature and pressure within the Earth.
- 44. a volcanic glass of felsic composition
- 45. a body of molten rock that is formed deep inside the Earth. It also includes any dissolved gases and crystals.
- 46. shortens a rock body.
- 48. a fine-grained metamorphic rock which contains platy minerals and it has excellent rock cleavage.
- 49. rocks formed by the alteration of preexisting rocks.
- 51. molten rock that solidifies beneath or at the surface.
- 53. a light color vesicular rock which has glassy texture.
- 56. a nonfoliated metamorphic rock which is coarse and crystalline.
- 57. medium, to coarse, grained metamorphic rocks which have a foliated texture.