igneous rocks and processes

Question 1

composition of magma

Answer 1

silicone, oxygen, aluminum, potassium, calcium, sodium, iron, magnesium

Question 1

molten rock beneath the earth’s surface

Answer 1

magma

Question 2

how is magma generated?

Answer 2

1. increase in temp
2. decrease in pressure
3. addition of volatiles

Question 3

types of magma

Answer 3

1. ultramafic
2. mafic
3. intermediate
4. felsic

Question 4

what is any process that causes magma composition to change

Answer 4

magma differentiation

Question 5

types of magma differentiation

Answer 5

1. assimilation
2. magma mixing
3. partial melting
4. fractional crystallization

Question 6

describes the temp at which minerals crystallize when cooled, or melt when heated

Answer 6

bowen’s reaction series

Question 7

plutonic structures

Answer 7

1. hypabyssal
2. deep-seated structures

Question 8

hypabyssal (shallow) structures

Answer 8

1. dike
2. sill
3. laccolith
4. lopolith

Question 9

igneous rock textures can be classified by:

Answer 9

1. rate of cooling
2. rate of silica
3. rate of volatiles

Question 10

igneous rocks by crystal size

Answer 10

1. phaneritic
2. pegmatitic
3. aphranitic
4. porphyritic

Question 11

igneous rocks by crystal shape

Answer 11

1. euredral
2. subredral
3. anhedral

Question 12

igneous rocks by degree of crystallinity

Answer 12

1. holocrystalline
2. holohyaline
3. hypocrystaline

Question 13

resources from igneous rocks

Answer 13

1. hydrothermal deposits
2. geothermal energy