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GLGY201 Lab > Naming Rocks !!! > Flashcards

Naming Rocks !!! Flashcards

1
Q

Igneous Phaneritic Rocks

A

G.D.G

Granite, Diorite, Gabbro

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2
Q

Igneous Aphanitic Rocks

A

B.A.R

Basalt, Andesite, Rhyolite

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3
Q

Felsic Igneous Rocks

A

Rhyolite, Granite

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4
Q

Intermediate Igneous Rocks

A

Andesite, Diorite

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5
Q

Mafic Igneous Rocks

A

Basalt, Gabbro

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6
Q

G.P.F

A

Granite = phaneritic, felsic

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7
Q

R.A.F

A

Rhyolite = aphanitic, felsic

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8
Q

D.P.I

A

Diorite = phaneritic, intermediate

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9
Q

A.A.I

A

Andesite = aphanitic, intermediate

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10
Q

G.P.M

A

Gabbro = phaneritic, mafic

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11
Q

B.A.M

A

Basalt = aphanitic, mafic

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12
Q

Add vesicular or

A

porphyritic in front of the base name of igneous rocks if present!

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13
Q

Naming Clastic Sedimentary Rocks Based on Grain Size

A

Clast name + rock name = name of rock

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14
Q

Clast names of clastic sedimentary rocks

A

Conglomerate (rounded clasts) or Breccia (angular clasts) for sizes: boulder to granule
Sandstone for very coarse sand to very fine sand
Siltstone/Mudstone/Shale for microscopic grain sizes

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15
Q

Naming Sandstones (for very coarse sand to very fine sand sedimentary rocks!!!!)

A

Feldspathic arenite, quartz arenite, lithic (rock) arenite INCLUDE GRAIN SIZE MODIFIER

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16
Q

Classification of Carbonate Rocks

A
  • Use Dunham classification of limestones diagram
  • All have modifier i.e oolitic or fossiliferous or dolomitic if including dolomite/calcite followed by type of stone: mudstone, wackestone, packstone, grainstone, or boundstone
16
Q

Metamorphic: if protolith is mudstone

A

Slate, phyllite, schist, or gneiss

17
Q

Naming Schists

A

HIGHEST-GRADE MINERAL then MOST-ABUNDANT MINERAL schist

18
Q

Non-foliated metamorphic: if protolith is quartz sandstone

A

Quartzite

19
Q

Non-foliated metamorphic: if protolith is conglomerate

A

Metaconglomerate

20
Q

Non-foliated metamorphic: if protolith is carbonate rock

A

Marble

21
Q

Non-foliated metamorphic: if protolith is mafic igneous rock

A

Amphibolite

GLGY201 Lab (6 decks)

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