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Earth Science > rocks quiz > Flashcards

rocks quiz Flashcards

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1
Q

Extrusive

A

volcanic

lava solidifies quickly at or near the surface → rocks can be non crystalline/glassy or have crystals <1mm

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2
Q

Intrusive

A

plutonic

magma solidifies slowly deep underground → rocks
have larger crystals >1mm

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3
Q

Felsic

A

light in color, low in density (left side of the chart)

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4
Q

Mafic

A

dark in color, high in density (right side of the chart)

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5
Q

monomineralic

A

Rocks made of one mineral

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6
Q

polymineralic

A

Rocks made of many minerals

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7
Q

Formation processes for clastic sedimentary rocks

A

weathering & erosion; deposition & burial; compaction and/or cementation (in rock cycle diagram on page 6)

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8
Q

Sedimentary rock can contain_____

A

fossils

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9
Q

Three types

A

Clastic, Crystalline, Bioclastic

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10
Q

Clastic

A

made of fragments (pieces of other rocks/sediments) cemented together; classified by grain size

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11
Q

Crystalline

A

crystals from chemical precipitates or evaporites; monomineralic

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12
Q

Bioclastic

A

precipitates of biologic origin or cemented shell fragments or compacted plant remains

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13
Q

Metamorphic formed by ______

A

heat and pressure

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14
Q

Made from__________

A

other rocks

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15
Q

Two types of Metamorphism

A

Regional and Contact

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16
Q

Regional

A

Rock is put under intense pressure and heat over large areas

17
Q

Contact

A

Rock is heated by lava or magma

18
Q

Two categories

A

Foliated and Non-Foliated

19
Q

Foliated

A

show mineral alignment and banding(only gneiss) - layering

20
Q

Non-Foliated

A

can be monomineralic or crystalline

21
Q

Vesicular

A

formed by expansion of a bubble of gas or steam during solidification of the rock

22
Q
A
23
Q

All the steps for clastic rocks

A

weathering and erosion- larger rock fragments being broken up and then moved

sediments- outcome of weathering and erosion

deposition- sediments being dropped off

burial- sediments being buried after drop off

compression- the more layer you get, the greater the pressure under the surface

compaction- the pressure causes compaction (sediments getting nice and close together)

cementation- after compaction, sediments get glued through a natural cement

24
Q

recrystallization

A

crystals in rocks organizing them selves due to the heat and pressure based off density

Earth Science (11 decks)

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