Gneiss Photos
Cochise College
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Metamorphic Rocks
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Roger Weller, geology instructor
Gneiss Photos
Gneiss
last edited:
8/14/08
number of photos: 63
Gneiss is a coarse grained, highly metamorphosed,
foliated rock.
The minerals found in gneiss are often the same ones
found
in granite.
Gneiss can be distinguished from granite by the presence
of
mineral layers or minerals aligned in one direction
(lineation) or in layers (foliation).
photos
gneiss:
A
B
C
D
E
gneiss, augen gneiss:
A
B
gneiss, biotite:
A
B
gneiss, corundum:
A
B
C
gneiss, cut:
A
B
gneiss, fine-grained:
1
2
3
4
5
6
gneiss, folds:
A
B
C
gneiss from California:
1
2
3
4
5
gneiss from Colorado:
1
2
3
4
5
6
7
gneiss, granitoid:
A
B
gneiss, hornblende:
A
B
C
D
gneiss, polished:
A
B
C
gneiss, porphyritic:
A
B
gneiss, rounded cobble:
A
B
C
gneiss, sillimanite-garnet:
A
B
gneiss, syenite:
A
B
gneiss with garnets:
A
B
C
gneiss with iron oxide concretions:
1
2
gneiss with pegmatite:
A
B
C
gneiss showing lineation:
A
B
Photos are copyright free for non-commercial educational uses.
Just
credit photos to R.Weller/Cochise College.
copyright 2008-R.Weller