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;
36 Cards in this Set
- Front
- Back
|
What determines the texture of an igneous rock? |
Cooling rate |
|
|
What determines the cooling rate of an igneous rock? |
Origin |
|
|
What is an aphanitic rock? |
Igneous rock composed of crystals too small to see with the naked eye |
|
|
What is a porphyritic-aphanitic rock? |
Igneous rock with visible crystals surrounded by crystals too small to see |
|
|
What is a glassy rock? |
Igneous rock composed of volcanic glass |
|
|
What is a pyroclastic rock? |
Igneous rock composed of volcanic particles which have been cemented or welded together |
|
|
What are the characteristics of a pyroclastic rock? |
Often show layering. Tend to be soft, crumbly, and chalky. Sometimes contain visible particles, which are more irregular in shape and dull in luster than visible crystals. Also, particles are more likely to protrude from the rock's surface than crystals. |
|
|
What is a phaneritic rock? |
Igneous rock composed entirely of visible crystals of about the same size |
|
|
What is a porphyritic-phaneritic rock? |
Igneous rock composed of two or more distinctly different sizes of visible crystals |
|
|
What is the cooling rate of an aphanitic rock? |
Fast cooling rate |
|
|
What is the cooling rate of a porphyritic-aphanitic rock? |
Slow, then fast cooling rate |
|
|
What is the cooling rate of a glassy rock? |
Very fast cooling rate |
|
|
What is the cooling rate of a pyroclastic rock? |
Fast cooling rate |
|
|
What is the cooling rate of a phaneritic rock? |
Slow cooling rate |
|
|
What is the cooling rate of a porphyritic-phaneritic rock? |
Very slow, then slow cooling rate |
|
|
What are the three commonly found minerals in a felsic rock? |
Potassium feldspar Sodium feldspar Quartz |
|
|
What are the three commonly found minerals in an intermediate rock? |
Intermediate feldspar Amphibole Biotite |
|
|
What are the three commonly found minerals in a mafic rock? |
Calcium feldspar Pyroxene Olivine |
|
|
What is the major mineral constituent of a felsic rock? |
Potassium feldspar |
|
|
What is the major mineral constituent of an intermediate rock? |
Intermediate feldspar |
|
|
What is the major mineral constituent of a mafic rock? |
Calcium feldspar |
|
|
What are the three volcanic textured igneous rocks? |
Rhyolite Andesite Basalt |
|
|
What are the three plutonic textured igneous rocks? |
Granite Diorite Gabbro |
|
|
Granite |
|
|
Andesite |
|
|
Basalt |
|
|
Volcanic Breccia |
|
|
Gabbro |
|
|
Obsidian |
|
|
Pumice |
|
|
Diorite |
|
|
Rhyolite |
|
|
What texture is obsidian? |
Glassy texture |
|
|
What texture is pumice? |
Glassy texture |
|
|
What texture is tuff? |
Pyroclastic texture |
|
|
What texture is volcanic breccia? |
Pyroclastic texture |
