Classifications of Rocks are: Igneous Rocks Sedimentary Rocks Metamorphic Rocks

1. ROCKS: Defined

4. Igneous Rocks Made by Fire

9. slow cooling results in the formation of large crystals.

11. Porphyritic Texture - has large crystals embedded with a matrix of smaller crystals.

12. Glassy Texture - results when the ions do not have sufficient time to unite into an orderly crystalline structure.

21. Andesitic or Intermediate Composition - rocks with a composition between granitic and basiltic rocks.

22. Peridotite - opposite side of the compositional spectrum from granitic rocks.

23. Sedimentary Rocks

24. Sediments are loose, unconsolidated accumulations of mineral rock particles that have been transported by wind, water, ice, or gravity and redeposited. Derived from the Latin sedimentum means settling, reference to a solid material settling out of a fluid.

26. precipitation of crystals out of solution.

27. usually, the particle are broken down further during this transport phase.

29. formed from the products of the mechanical breakup of other rocks.

31. other major energy sources (petroleum and natural gas) occur in pores of sedimentary rocks.

34. the rock is called conglomerate if the sediment is rounded.

38. Chalk– soft, porous rock made up almost entirely of the hard parts of microscopic organisms. Travertine – type of limestone that decorates taverns.

42. Features of Sedimentary Rocks

44. Strata – the single most characteristic feature of sedimentary rocks.

49. Agents of Metamorphism

53. the deeper you go in the ocean, the greater you confining pressure.

56. believed to play an important role in some types of metamorphism.

58. Common Metamorphic Rocks

60. a most useful rock for roof and floor tile, chalkboards, and billiard tables.

61. can be almost of any color, depending on its mineral constituents.

63. Schists– strongly foliated rocks, formed by regional metamorphism. - Platy and can be readily split into thin flakes or slabs.

64. Nonfoliated Rocks Marble – a coarse, crystalline rock whose parent rock is limestone. - Composed of large interlocking calcite crystals, which formed from crystallization of smaller grains in the parent rock.

65. Quartzite – a very hard metamorphic rock most often formed from quartz and sandstone.

67. Helps to understand the origin of igneous, sedimentary, and metamorphic rocks.

69. Reported by: Mingel P. Rico IV-12 BSE English