Igneous Flashcards
1
Q
Granite
- how did the rock form
- minerals present
- Texture
A
- low temperature (last to crystallize) intrusive
- Potassium Feldspar (dominant) / Biotite / Quartz
- phaneritic
2
Q
Diorite
- how did the rock form
- minerals present
- Texture
A
- slow cooling / low / med temp
- Amphibole / Na Rich plagioclase
- phaneritic
3
Q
Gabbro
- how did the rock form
- minerals present
- Texture
A
- slow cooling
- hornblende / auguite/ pyroxene
- phaneritic
4
Q
Pumice
- how did the rock form
- minerals present
- Texture
A
- Rapid cooling / extrusive
- N/A
- Frothy vesicular
5
Q
Rhyolite
- how did the rock form
- minerals present
- Texture
A
- Extrusive
- N/A
- Aphanitic
6
Q
Obsidian
- how did the rock form
- minerals present
- Texture
A
- extrusive
- N/A
- Glassy compact
7
Q
Welded Tuff
- how did the rock form
- minerals present
- Texture
A
- N/A
- N/A
- Pyroclastic
8
Q
Vesicular Basalt
- how did the rock form
- minerals present
- Texture
A
- N/A
- N/A
- vesicular aphaitic
9
Q
Porphytric Andesite
- how did the rock form
- minerals present
- Texture
A
- 2 stage: Intrusive/ extrusive
- Ca Rich Plagioclase Feldspar / Amphibole
- porphytic
10
Q
Scoria
- how did the rock form
- minerals present
- Texture
A
- Extrusive / Fast cooling
- N/A
- Vesicular
11
Q
Basalt
- how did the rock form
- minerals present
- Texture
A
- N/A
- N/A
- Aphantic
12
Q
Syenite
- how did the rock form
- minerals present
- Texture
A
- N/A
- N/A
- Phaneritic
