Rocks

Question 1

How are igneous rocks classified, and what are the 6 classifications

Answer 1

Silica content and Environment (intrusive/extrusive)
Rhyolite, Andesite, Basalt.
Granite, Diorite, Gabbro

Question 2

List Fragments from largest to smalles (with size)

Answer 2

Boulder >64 mm, pebbles 64-2 mm, sand silt 2-.06, clay

Question 3

What ranges are considered low, medium and high silica content in igneous rocks

Answer 3

Low: 45-52
Medium: 52-66
High: 66-77

Question 4

Shale is a protolith of…. (In order)

Answer 4

Slate-sheets, cant see mineral crystals, breaks apart in slabs
Phyllite- silky, shiny sheen
Schist-minerals are growing and identifiable
gneiss-beautiful big crystals

Question 5

Common Non-foliated rocks

Answer 5

These metamorphosed more quickly, not allowing time to crystallize. Contact metamorphism, perhaps?
Skarn- Crystalline rock (Can have garnet, pyroxene, chlorite, Fe-Ti oxides, and sulfides
Marble- Crystalline rock (Has calcite and dolomite)
Hornfels- Hard, microcrystalline

Question 6

Conglomerate is a protolith of…. (In order)

Answer 6

Metaconglomerate

Question 7

Sandstone is a protolith of…. (In order)

Answer 7

Schist-minerals are growing and identifiable
Gneiss-beautiful big crystals

Question 8

Limestone is a protolith of…. (In order)

Answer 8

Cacareous schist, marble

Question 9

Basalt is a protolith of…. (In order)

Answer 9

Metabasalt/greenstone
amphibolite

Question 10

Andesite is a protolith of…. (In order)

Answer 10

Schist
Gneiss

Question 11

Rhyolite is a protolith of…. (In order)

Answer 11

Schist
Gneiss

Question 12

Granite is a protolith of…. (In order)

Answer 12

Gneiss +Quarts +Feldspar

Question 13

Gabbro is a protolith of…. (In order)

Answer 13

Gneiss +Plagioclase +mafics