Geology 200A - Rock Classification Test Name:

(Please write legibly!) Student #:

1.) Draw and annotate the the Basalt Tetrahedron (15)

 

 

 

 

 

 

 

 

2) Draw on a P-T diagram the approximate distribution of the greenschist, blueschist, eclogite, amphibolite, and granulite metamorphic facies. (15)

 

 

 

 

 

 

 

 

3) Draw the classification triangle for ‘clean’ sandstones: (15)

 

 

 

 

 

 

 

 

4.) Define or explain the terms: (8)

a) Fractional crystallization (2)

 

b) Fluvial (2)

 

c) Abyssal (2)

 

d) Dynamothermal (2)

 

 

5.) Explain the terms: (12)

a) cumulate (2)

 

b) clastic (2)

 

c) pyroclastic (2)

 

d) protolith (2)

 

 

e) tectonite (2)

 

f) indurated (2)

 

 

6.) In what environments do the following structures/textures/fabrics form: (10)

a) cross bedding (2)

 

b) graded bedding (2)

 

c) porphyritic (2)

 

d) schistose (2)

 

e) migmatitic (2)

 

 

7.) What do the following rock types have in common, and what accounts for their difference: (10)

argillite, slate, phyllite, and schist?

 

 

 

8.) Describe the mineralogical and/or textural characteristics of the following rock types: (15)

a) Gabbro

b) Lherzolite

c) Granodiorite

d) Trachyte

e) Granite

f) Siltstone

g) Greywacke

h) Mud

i) Paraconglomerate

j) Claystone

k) Grainstone

l) Micritic sandstone

m) Mylonite

n) Hornfels

o) Slate