How Minerals Form
Minerals From Magma/Lava
- Magma (underground); lava (above ground)
- Forms as magma cools inside crust/lava hardens
- Crystals form as the liquid cools to a solid
- Size Differences
• Cooling rate of magma/lava
- Slow cooling=large crystals (crystals will continue to from if left
undisturbed)
- Fast cooling= small crystals (no time for large crystals)
• Amount of gas in magma
• Chemical make up
-
Minerals From Solutions
- Solution-mixture where one substance is dissolved in another
- When elements and compounds that are dissolved in water leave a solution
crystallization occurs
-
Underground water and bodies of surface water
- From Evaporation
• Water from solution evaporates
- Halite- formed from ancient oceans evaporating
- From Hot Water Solutions
• Magma heats ground water and
elements/compounds dissolve into the water
•
Solution cools and the elements/compounds leave and crystalize
• Often form veins- solutions of hot water will flow through cracks in the rock
1
How Minerals Form
Minerals From Magma/Lava
- Magma (
); lava (
)
- Forms as
- Crystals form as the liquid cools to a
- Size Differences
•
rate of magma/lava
- Slow cooling=
left undisturbed)
(crystals will continue to from if
- Fast cooling=
(no time for large crystals)
• Amount of
in magma
• C
-
Minerals From Solutions
- Solution-mixture where one substance is
in another
- When elements and compounds that are dissolved in water
crystallization occurs
-
water and bodies of surface water
- From Evaporation
•
from solution evaporates
-
- From Hot Water Solutions
•
heats ground water and
elements/compounds dissolve into the water
• Solution cools and the elements/compounds
• Often form
the rock
2
- solutions of hot water will flow through
in
3