Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off
Reading...
Front

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key

image

Play button

image

Play button

image

Progress

1/15

Click to flip

15 Cards in this Set

  • Front
  • Back
  • 3rd side (hint)
Where do magmas originate?
Originate in the mantle
Famous Yankee great
In what 3 ways do magmas melt?
1) Increase Temperature
2) Decompression melting
3) Flux Melting
What is "Flux Melting"?
Introduce water to lower the melting point of the material
lowers something
What is decompression melting?
release pressure due to stretching of lithosphere
Characteristics of Intrusive rocks
- deep underground
- slow cooling
- coarse grained
Characteristics of Extrusive rocks
- near surface
- cool rapidly
- fine grained
Phaneritic
- coarse grained
- large grains (seen with eye)
big
Porphoritic
- 2 grain sizes
- phenocrysts embedded in smaller grains matrix
Aphanitic
fine grained
vesicular
full of holes (gas bubbles)
gassy
glassy texture
- no grains
- rapid cooling rate
- commonly black
Ferromagnesian
- more Fe and Mg present
- darker in color

ex: Gabbro, Basalt
see root words
Non-Ferromagnesian
- less Fe and Mg present
- more silica present
- lighter color

ex: Granite, Rhyolite
see root words
What is Magmatic differentiation?
how magmas change composition to form different igneous rock types
its in the name
What ways does magmatic differentiation occur?
1) Crystalization - cools and crystalizes
2) Assimilation - melts and combines with other rock
3) mixes with other magma
3 ways