45) Cleavage in a mineral is controlled by which of the following? A. Planes alo

Question

45) Cleavage in a mineral is controlled by which of the following?

A. Planes along which bonding is weak

B. The predominant direction light is transmitted through a crystal

C. Linear chains of oxygen atoms

D. Breakage planes caused by high pressure

E. Cracks formed by applied high temperature

46) SiO2 is the chemical composition of which of the following minerals?

A. Gypsum

B. Amphibole

C. Halite

D. Pyroxene

E. None of the above.

47) (Mg, Fe)2SiO4 is the chemical composition of which of the following minerals?

A. Gypsum

B. Calcite

C. Halite

D. Olivine

E. None of the above

Questions 49-52: The diagram below shows a geologic section with metamorphic

rock (V), a pluton (A) dikes (S and S (same age) and E) and three faults (C, K, P)

49) How many unconformities (including all three types) are there?

A. 0

B. 1

C. 2

D. 4

E. 6

50) Which is the oldest of the following?

A. Fault P

B. Dikes S

C. Fault K

D. Dike E

51) Which of the following is NOT true?

A. The unconformity between X and B is an angular unconformity

B. The unconformity between V and O is a nonconformity

C. The unconformity between D and F is a nonconformity

D. The unconformity between G and L is an angular unconformity

E. None of the above

52) What is a correct sequence of ages from oldest to youngest?

A. B, K, M.G, D

B. X, B, Z, A, L

C. C, M, K, S, P

D. O, M, E, K, A

E. None of the above

Pretty please answer all! :) (*insert puppy dog face*)

Explanation / Answer

45) Planes along which bonding is weak

cleavage is the plane of weakness along which a mineral easily breaks

46) none of the above. sio2 is chemical formula for quartz

47) olivine

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