Term
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Definition
Scoria
Scoriaceous, Mafic, Pyroclastic |
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Term
[image]
Mineral 9
Luster:Vitreous
Hardness:6
Streak:White
Cleavage/Fracture:Cleavage at 90
Other Properties: Pink |
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Definition
| Potassium Feldspar/ K-spar |
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Term
[image]
Luster: Vitreous
Hardness: 7
Streak: White
Cleavage/Fracture: Conchoidal Fracture
Other Properties:n/a |
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Definition
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Term
[image]
Luster:Pearly
Hardness:2.5
Streak:White
Cleavage/Fracture: 1 Perfect
Other Properties: Dark |
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Definition
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Term
[image]
Luster:Pearly
Hardness:2.5
Streak:White
Cleavage/Fracture: 1 Perfect
Other Properties: Light/Clear |
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Definition
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Term
[image]
Luster: Metalic
Hardness:6
Streak:Brown
Cleavage/Fracture: Fracture
Other Properties:n/a |
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Definition
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Term
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Definition
Rhyolite
Aphanitic, Felsic
Contains: Biotite, Quartz, K-spar,Sodium rich Plagioclase, and some Amphibole |
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Term
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Definition
Porphyritic Rhyolite
Porphyritic, Felsic
Contains: Biotite, Quartz, K-spar,Sodium rich Plagioclase, and some Amphibole
*Porphyritic rocks are classified by their fine crystalline rock |
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Term
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Definition
Obsidian
Glass, unknown composition, Pyroclastic |
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Term
[image]
Luster:Vitreous
Hardness:3
Streak: White
Cleavage/Fracture: 3 directions
Other Properties:Reacts to acid |
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Definition
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Term
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Definition
Diorite
Intermediate, Phaneritic
Contains: Amphibole, Pyroxene, Calcium-rich Plagioclase, slight biotite |
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Term
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Definition
Gabbro
Phaneritic, Mafic
Contains: Olivine, Pyroxene, Slight Amphibole and Calcium-rich Plagioclase |
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Term
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Definition
Basalt
Aphanitic, Mafic
Contains: Olivine, Pyroxene, Slight Amphibole and Calcium-rich Plagioclase |
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Term
[image]
Luster:Vitreous
Hardness:2.5
Streak:White
Cleavage/Fracture:3 directions
Other Properties: Salty |
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Definition
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Term
[image]
Luster:Vitreous
Hardness:5.5
Streak:Black
Cleavage/Fracture:2 at 90
Other Properties:n/a |
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Definition
Pyroxene
Shorty and stubbier |
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Term
[image]
Luster: Dull
Hardness: 5.5
Streak: Black
Cleavage/Fracture: 2 not at 90
Other Properties:n/a |
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Definition
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Term
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Definition
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Term
[image]Luster:
Hardness:
Streak:
Cleavage/Fracture:
Other Properties: |
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Definition
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Term
[image]
Luster:
Hardness:
Streak:
Cleavage/Fracture:
Other Properties: |
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Definition
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Term
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Definition
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Term
[image]
Luster:
Hardness:
Streak:
Cleavage/Fracture:
Other Properties: |
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Definition
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Term
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Definition
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Term
[image]
Luster:
Hardness: 6
Streak:
Cleavage/Fracture:
Other Properties: |
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Definition
Calcium Plagioclase
"Labradorite" |
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