Minerals Flashcards

1
Q

Mineral

A

A naturally occurring and inorganic compound whose composition can be expressed as a chemical formula

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2
Q

Native mineral

A

A mineral composed of a single element

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3
Q

Compound mineral

A

Made of a combination of elements

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4
Q

Accessory mineral

A

Minerals occurring within a rock in small quantities

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5
Q

Lustre

A

The surface appearance of the mineral

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6
Q

Habit

A

The shape of the mineral

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7
Q

Cleavage

A

Planes of weakness in the mineral

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8
Q

Fracture

A

the way the mineral breaks if no cleavage is present

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9
Q

Order of minerals in Mohs scale of hardness

A
Talc
Gypsum
Calcite
Fluorite 
Apatite
Feldspar
Quartz
Topaz
Corundum 
Diamond
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10
Q

Twinning

A

When 2 or more crystals grow with different orientations from a common plane

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11
Q

Silicate minerals

A

Minerals composed of silicon and oxygen

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12
Q

Bridging oxygen

A

An O2 atom shared by 2 SiO4 tetrahedra in a crystal structure

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13
Q

Rock

A

A naturally occurring substance composed of an aggregate of 1 or more minerals

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14
Q

Weathering

A

The in situ breakdown of material by mechanical and chemical processes

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15
Q

Erosion

A

A process whereby particles are detached from rock by the action of wind water and ice

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16
Q

Transport

A

The process whereby eroded rock particles are moved by the action of wind water or ice

17
Q

Deposition

A

The laying down of rock particles after being transported by water ice or wind

18
Q

Extrusion

A

The process where igneous rock has flowed out to the surface

19
Q

Burial

A

The term for when successive layers of sedimentary rock are laid on top of one another

20
Q

Diagenesis

A

The change that takes place in sedimentary rock due to burials and involving low temps and pressures

21
Q

Recrystallisation

A

A process where the form and texture of a rock minerals changed without changing the overall composition

22
Q

Metamorphism

A

A process whereby changes are brought to rocks in the earths crust by the action of heat and pressures

23
Q

Partial melting

A

The incomplete melting of a rock to produce a melt of a different composition

24
Q

Magma accumulation

A

The collection of magma at the base of the earths crust prior to the intrusion

25
Q

Crystallisation

A

The gradual solidification of minerals from a melt

26
Q

Intrusion

A

A body of igneous rock that has forced its way into pre-existing rock

27
Q

Orogenesis

A

Mountain building/ significant tectonic uplift