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32 Cards in this Set

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Igneous Rock with major minerals:
Quartz
K-Feld
Na-Feld
Granite
Igenous Rock with major minerals:
K-Feld
(minor possibly sodalite)
Syenite
Igneous Rock with major minerals:
Quartz
Na/Ca Feld
Hornblende
Biotite
Tonalite
Igneous Rock with major minerals:
Na/Ca Feld
Hornblende
Diorite
Colors of Rhyolite:
White to Redish (can be faint purple)
Colors of Trachyte:
White
Light gray
Light brown
Greenish
Orange
Colors of Dacite:
Gray
*sometimes has minor quartz
Colors of Andesite:
Gray
Dark Brown
Greenish
Rock with these minor minerals:
Hornblende
biotite
muscovite
Granite
Rock with these minor minerals:
Na/Ca Feld
Hornblende
Biotite
feldspathoids (some)
Sodalite
Syenite
Rock with
Major Minerals: Quartz, Na/Ca Felds, Horn
Minor minerals: K-feldspar
Tonalite
What is a rock where the entire rock is made up of large crystals, which are generally 1/2 mm to several centimeters in size; no fine matrix material is present.
Phaneritic
This rock texture consists of small crystals that cannot be seen by the eye with or hand lens.
Aphenitic
This rock texture is composed of at least two minerals having a conspicuous (large) difference in grain size.
Porphyritic
What texture?
What Rock type?
(aphenitic ground mass)
Porphyritic Andesite
What texture?
What Rock type?
(aphenitic ground mass)
Porphyritic Andesite
What rock texture?
What rock type?
(has quartz, K-feld, Na-feld)
Granite
What rock type?
(no crystals)
Rhyolite
What rock texture?
What rock type?
(no crystals in ground mass)
Porphyritic Andesite
What rock texture?
What rock type?
(no crystals in ground mass)
Porphyritic Andesite
What rock type?
(no crystals)
Dacite
What rock type?
Dacite
What rock texture?
What rock type?
(no crystals in ground mass)
Porphyritic Rhyolite
(although it looks almost black it had a red tint)
What rock type?
(Na/Ca Felds, Hornblende)
Diorite
What rock type?
(no crystals in ground mass)
Rhyolite
What rock texture?
What rock type?
(no crystals in ground mass)
Aphenitic Rhyolite
What rock texture?
What rock type?
(has k-felds)
Syenite
(I say porphorytic)
What rock texture?
What rock type?
(no crystals in ground mass)
Trachyte, porphyritic
What rock type?
(no crystals in ground mass)
Trachyte
(greenish)
What rock type?
(no crystals in ground mass)
Trachyte
Rock with these minor minerals:
Pyroxene
Biotite
traces of quartz
Diorite
What rock type?
(Na/Ca Felds, Hornblende)
Diorite