Quiz 3

Question 1

Detrital sedimentary

Answer 1

Made mostly of rock fragments, quartz gains, clay, or feldspars ex.Breccia,Mudstone or shale,Conglomerate,Arkose

Question 2

Bioclastic sedimentary

Answer 2

Made mostly of grains that are fragments or shells of organisms ex.Peat,Coal

Question 3

Chemical sedimentary

Answer 3

Made mostly of precipitate from aqueous solution or chemical residues ex.Rock salt, iron stone,chert, limestone

Question 4

The 6 sorting sizes of sedimentary rocks

Answer 4

1)Gravel
2)Sand
3)Silt
4)Clay
5)Microcrystaline
6)Crystalline

Question 5

Breccia

Answer 5

Grain size = 2 cm or greater and Clasts are angular

Question 6

Conglomerate

Answer 6

Grain size = 2 cm or greater and Clasts are rounded

Question 7

Arkose Sandstone

Answer 7

dominantly composed of
feldspar

Question 8

Lithic Sandstone

Answer 8

Dominantly composed of
lithic/rock fragments

Question 9

Slaty cleavage

Answer 9

Flat foliation developed along flat parallel closely spaced planes

Question 10

Phylite texture

Answer 10

A wavy or wrinkled foliation of fine grained platy minerals like mica giving a metallic luster

Question 11

Schisosity

Answer 11

mode of foliation that occurs in certain metamorphic rocks as a consequence of the parallel alignment of platy and lath-shaped mineral constituents.

Question 12

Gnessic banding

Answer 12

alternating light and dark bands on gneiss are called gneissic banding. These bands are created by foliation when extreme pressure aligns the platy and elongated crystals from the parent rocks.

Question 13

Nonfoliated metamorphic rock

Answer 13

Have no obvious layering although they may exhibit sketched fossils or long prismatic crystals

Question 14

Crystalline texture

Answer 14

A medium to coarse grained aggregate of intergrown usually equal sized visible crystals ex.marble

Question 15

Microcrystaline texture

Answer 15

Finegrained aggregate of intergrown microscopic crystals ex. hornfel

Question 16

Sandy texture

Answer 16

A medium to fine grained texture aggregate of fused sand sized grains that resemble sandstone ex.quartzite

Question 17

Glassy texture

Answer 17

a homogenous texture with no visable grains or other surfaces that break along glossy surfaces and resemble glass ex.anthracite coal

Question 18

Porphyroblastic texture

Answer 18

An arrangement of large crystals set in a finer grained ground mass and is analogous to porphyritic texture in igneous rock

Question 19

Foliations patterns from high pressure and high temp to low pressure and low temp

Answer 19

1)Gneiss
2)Schist
3)Phyllite
4)Slate

Question 20

Regional metamoprhisim

Answer 20

a large area is affected by changes in temperature and/or pressure. One type of regional metamorphism occurs at convergent plate boundaries, where rocks are subjected to a variety of pressures and temperatures, resulting in a thermodynamic metamorphism

Question 21

Contact metamorphism

Answer 21

he type of metamorphism attributed to increased temperature, usually from proximity to a heat source such as an intrusive magma body or a lava flow, and the rock undergoes a thermal metamorphism.

Question 22

hydrothermal metamorphism

Answer 22

Rocks that are in contact with hot, chemically reactive fluids can also fall within the contact metamorphism category; recrystallization due to this type of contact