Quiz 2

Question 1

Pegmatic texture

Answer 1

Crystals>1cm very slow cooling in viscous magma, intrusive

Question 2

Phaneritic texture

Answer 2

crystals 1-10mm, slow cooling, viscous magma, intrusive

Question 3

Porphyritic Texture

Answer 3

Large and small crystals due to changes in cooling rate or composition, can be intrusive or extrusive

Question 4

Aphanitic Texture

Answer 4

Crsytals<1mm, rapid cooling from fluid lava, extrusive

Question 5

Glassy texture

Answer 5

rapid cooling or poor nucleation, extrusive

Question 6

Vesicular texture

Answer 6

Rapid cooling of gas charged lava leading to a bubbly texture, extrusive

Question 7

Pyroclastic or fragmental texture

Answer 7

Particles emitted from volcanoes

Question 8

Bowens reaction series in order

Answer 8

Ultramafic- Peridiot, Komatite, Olivine
Mafic-Pyroxene, Garbbo and Basalt, Calcium feldspar
Intermediate magma-Amphibole and Biotite mica, Diorite and Andesite, Sodium feldspar
Felsic-Quartz,Feldspar,Granite, Rhyolite

Question 9

Ultramafic rock

Answer 9

Peridiot, Komatite, Olivine

Question 10

Mafic rock

Answer 10

Pyroxene, Garbbo and Basalt,Calcium feldspar

Question 11

Intermediate magma

Answer 11

Amphibole and Biotite mica, Diorite and Andesite,Sodium feldspar

Question 12

Felsic rock

Answer 12

Quartz,Feldspar,Granite, Rhyolite