Fine-grained ("volcanic") normal crystalline igneous rock
A rock classification type
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About Fine-grained ("volcanic") normal crystalline igneous rock
Fine-grained ("volcanic") normal crystalline igneous rocks are a subdivision of normal crystalline igneous rocks that are dominated by mineral grains mostly <2mm, not readily identifiable to the naked eye. The subtypes usually must be petrographically and/or chemically analysed and plotted on QAPF or TAS diagrams to characterise them precisely.
Unique Identifiers
Mindat ID:
48444
Long-form identifier:
mindat:1:1:48444:8
Classification of Fine-grained ("volcanic") normal crystalline igneous rock
- Rock
- Igneous rock
- Normal crystalline igneous rock
- Fine-grained ("volcanic") normal crystalline igneous rock
- Normal crystalline igneous rock
- Igneous rock
The QAPF diagram breaks fine-grained crystalline igneous rocks down into 15 groups.
1 Not Defined
2 Alkali-Feldspar Rhyolite
3 Rhyolite
4 Dacite
5 Plagidacite
6 Alkali-Feldspar Trachyte
6* Quartz-Bearing Alkali-Feldspar Trachyte
6' Foid-Bearing Alkali-Feldspar Trachyte
7 Trachyte
7* Quartz-Trachyte
7' Foid-Bearing Trachyte
8 Latite
8* Quartz-Latite
8' Foid-Bearing Latite
9 Andesite
9* Quartz-Bearing Andesite
9' Foid-Bearing Andesite
10 Basalt
10* Quartz-Bearing Basalt
10' Foid-Bearing Basalt
11 Phonolite
12 Tephritic Phonolite
13 Phonolitic Tephrite / Phonolitic Basanite
14 Tephrite / Basanite
15a Phonolitic Foidite
15b Tephritic Foidite
15c Foidite
The TAS classification for fine-grained crystalline igneous rocks.
F Foidite
Pc Picrite
B Basalt
O1 Basaltic Andesite
O2 Andesite
O3 Dacite
R Rhyolite
U1 Tephrite, basanite
U2 Phonotephrite
U3 Tephryphonolite
Ph Phonolite
S1 Trachybasalt
S2 Basaltic Trachyandesite
S3 Trachyandesite
T Trachyte
Sub-divisions of Fine-grained ("volcanic") normal crystalline igneous rock
- Fine-grained ("volcanic") normal crystalline igneous rock
- Anameseid
- Andesite-basalt
- Basaltite
- Essexite-basalt
- Eurite
- Felsophyrite
- Ordanchite
- Pillow lava
- Rhombporphyry
- Skomerite
- Rhyolitoid
- Dacitoid
- Trachytoid
- Andesitoid
- Phonolitoid
- Foiditoid
- Ultrabasic volcanic rock
- Basic volcanic rock
- Intermediate volcanic rock
- Acid volcanic rock
- Mafic volcanic rock
- Adakite
- Amygdaloid
- Felsite
- Aphanite
- Augitite
- Melaphyre
- Craignurite
- Basanitoid
- Dolerite
- Porphyry
- Amygdalophyre
- Basite-porphyry
- Bornite (of Pinkerton)
- Chlorophyre
- Cristulite
- Cumulophyre
- Felseid
- Felsogranophyre
- Felsophyre
- Nepheline porphyry
- Ouachitite
- Porphyrite
- Spurine
- Uralite porphyry
- Biotite-feldspar porphyry
- Feldspar porphyry
- Hornblende porphyry
- Augite porphyry
- Quartz porphyry
- Quartz-feldspar porphyry
- Quartz-feldspar-biotite porphyry
- Vitrophyric porphyry
- Nepheline-feldspar porphyry
- Alsbachite
Synonyms of Fine-grained ("volcanic") normal crystalline igneous rock
Internet Links for Fine-grained ("volcanic") normal crystalline igneous rock
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References for Fine-grained ("volcanic") normal crystalline igneous rock
Reference List:
Wyoming, USA