Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
5 Cards in this Set
- Front
- Back
Intrusive (plutonic)
|
From underground
Solidification of magma Cool slowly Crystals have time to grow large Coarse- grained texture |
|
Extrusive (volcanic)
|
Form at surface
Solidifcation of lava Cool quickly Crystals do not have time to grow large. Fine-grained texture |
|
Felsic Magma
|
Thick and slow
Large amounts of silica (Si,O) Less dense More Al and Na Lighter in color |
|
Mafic magma
|
Hotter, thinner, and more fluid
Lower amounts of silica Denser More Fe and Mg Darker in color |
|
Basalt
|
1. Darker color
2. High specific gravity 3. Fine grained 4. Forms at the surface, principally in the ocean basins but also in isolated "hot spots" on the continents. |