1.4 Identifying rock textures
Take a look at a hand specimen and a thin section of each of these rocks:
(open the links in a new window so you can come back to this page more easily)
When you've taken a good look at the rocks, complete the quiz below.
Activity 1.2 Rock specimen quiz
You may take as many attempts as you wish to answer each question, and you can skip questions and come back to them later if you wish.
1. Select all the correct observations of each textural feature of gneiss:
2. Select all the correct observations of each textural feature of conglomerate:
3. Select all the correct observations of each textural feature of gabbro:
4. Gneiss has a banded crystalline texture and is therefore …
5. Conglomerate has a fragmental texture and is therefore …
6. Gabbro has a crystalline texture and lacks mineral alignment or banding and is therefore …
OpenLearn - An Introduction to Geology
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