1. CH 6 Rocks & Rock Cycle Quiz Review

2. Plagioclase feldspar, biotite, pyroxene, amphibole, and olivine are common minerals in felsic/mafic igneous rocks.

3. mafic

4. Rocks are composed of _____________.

5. More than one mineral

6. ___________ is intrusive, coarse-grained, and felsic, while ______________ is extrusive, fine-grained, and mafic. Basalt Shale Granite Marble

7. Granite, Basalt

8. In the rock cycle, rocks are classified by ___________.

9. How they form

10. A non-foliated metamorphic rock formed from quartz sandstone is __________.

11. quartzite

12. Felsic/mafic rocks are high in iron and magnesium.

13. mafic

14. Shale is a(n) ______________ rock.

15. Sedimentary

16. Stratification, fossils, ripple marks, mud cracks, nodules, concretions, and geodes are found in _________________ rocks.

17. sedimentary

18. Which of the following pairs includes a metamorphic rock & its parent rock? – Slate & obsidian – Granite & limestone – Gneiss & marble – Slate & shale

19. Slate & shale

20. A ___________ any rock mass that forms when magma pushes into fractures (cracks) in the bedrock

21. pluton

22. Bioclastic rocks form from ________________.

23. The remains of plants or animals

24. A rock that is light in color and low in density would be felsic/mafic.

25. Felsic

26. Shells are often found in which rock?

27. Limestone (coquina)

28. An porphyry is an igneous rock that has _________ very different crystal sizes (textures). – Ex. Large crystals in a fine groundmass

29. two

30. Intrusive igneous rocks have ____________ texture & extrusive igneous rocks have ____________ texture.

31. Intrusive –coarse or very coarse, non-vesicular Extrusive—glassy or fine, vesicular or non- vesicular

32. A felsic rock that has holes and fine-grained crystals is _____________.

33. Vesicular rhyolite

34. Gabbro is a(n) _________ rock

35. igneous

36. The grain size for sand is ________.

37. 0.006 to 0.2 cm

38. Felsic/mafic rocks are high in aluminum.

39. felsic

40. ____________ shows platy mica crystal visible from metamorphism of clay or feldspars.

41. schist

42. Potassium feldspar, quartz, plagioclase feldspar, biotite, and amphibole are common minerals in felsic/mafic igneous rocks.

43. felsic

44. Which igneous rock is intrusive and have a very coarse, non-vesicular texture?

45. pegmatite

46. Foliated metamorphic rocks can show __________ or ____________ textures.

47. Mineral alignment or banded

48. Minerals precipitating out of water or being left behind when water evaporates form __________________ sedimentary rocks.

49. chemical

50. What is the main difference between conglomerate and breccia?

51. Conglomerate– rounded particles Breccia—angular particles

52. Marble is a(n) _____________ rock.

53. Metamorphic

54. The composition of rock salt is _________.

55. halite

56. Mafic rocks have _________ density and are ________ in color.

57. High density, dark color

58. Coal’s composition is ___________.

59. carbon

60. Dikes, sills, laccoliths, volcanic necks, and batholiths are examples of _______________.

61. plutons

62. The weathering, erosion, and deposition of rock fragments such as sand forms _____________ sedimentary rocks.

63. clastic

64. When sediments are deposited, what size sediment (large or small) would be closest to the beach & what size would be further out in the ocean?

65. Beach – large Ocean – small