1.4 Identifying rock textures
Take a look at a hand specimen and a thin section of each of these rocks:
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- gneiss (pronounced ‘nice’) [Tip: hold Ctrl and click a link to open it in a new tab. (Hide tip)]
- conglomerate
- gabbro
When you've taken a good look at the rocks, complete the quiz below.
Activity 1.2 Rock specimen quiz
a.
Interlocking crystals
b.
Rounded grains
c.
Randomly oriented crystals/grains
d.
Crystals/grains showing banding or alignment in one preferred direction
The correct answers are a and d.
a.
Interlocking crystals
b.
Rounded grains
c.
Randomly oriented crystals/grains
d.
Crystals/grains showing banding or alignment in one preferred direction
The correct answers are b and c.
a.
Interlocking crystals
b.
Rounded grains
c.
Randomly oriented crystals/grains
d.
Crystals/grains showing banding or alignment in one preferred direction
The correct answers are a and c.
a.
sedimentary
b.
metamorphic
c.
igneous
The correct answer is b.
a.
igneous
b.
metamorphic
c.
sedimentary
The correct answer is c.
a.
sedimentary
b.
igneous
c.
metamorphic
The correct answer is b.