Pg three Flashcards
1
Q
What determines how large or small the crystal size of the minerals within
A
The cooling rate
2
Q
What are the four textures of igneous rocks?
A
Pyroclastic, Froth, Fine grained igneous rocks, Intrusive rocks
3
Q
What is the fastest to slowest cooling textures?
A
Pyroclastic, Froth, Fine Grained Igneous Rocks, Intrusive Rocks
4
Q
Do crystals form on pyroclastic rocks? And what happens to the ash and cinders?
A
No, crystals do not form. The ashes and cinders cement or fragment together.
5
Q
Do crystals form on froth rocks?
A
No
6
Q
What texture do froth rocks have?
A
Glassy
7
Q
Do crystals form on Fine grained rocks?
A
Yes
8
Q
Where do fine grained igneous rocks cool? What is it called? What appearance do they have?
A
Above the surface, they’re “extrusive”
9
Q
What texture do intrusive rocks have?
A
Coarse
