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6. Which of these is discordant to the bedding?
- A lava flow
- None of these
- A pluton
- A dyke
- A sill
7. The definitions of fine, medium and coarse crystals are what: (respectively)
- Under 1mm, 1 - 5mm, Over 5mm
- Under 0.5mm, 0.5 - 1mm, Over 1mm
- Under 1mm, 1 - 2mm, Over 2mm
- Under 1mm, 1 - 3mm, Over 3mm
- Under 0.5mm, 0.5 - 3mm, Over 3mm
8. Which of these is a mafic, fine crystaline rock?
- Gabbro
- Basalt
- Obsidean
- Andersite
- Granite
9. Which of these does not have coarse crystals?
- Diorite
- Granite
- Gabbro
- Dolerite
- Peridotite
10. Generally, which have a higher density?
- Mafic Rocks
- Silicic Rocks
- They are the same
- You can't tell
11. Which rock has a lot of vesicles?
- Gabbro
- Obsidean
- Peridotite
- Pumice
- Rhyolite
12. Silicic Minerals include:
- Feldspar, Quartz, Muscovite Mica
- Biotite Mica, Pyroxene, Olivine
- Quartz, Biotite Mica, Muscovite Mica
- Feldspar, Quartz, Biotite Mica
- Muscovite Mica, Quartz, Olivine
13. One rock is classed as 'Ultramafic'. Which is it?
- Granite
- Peridotite
- Gabbro
- Dolerite
- Rhyolite
14. For 3 coarse crystal rocks, the order from most Silicic to most Mafic goes:
- Gabbro - Diorite - Granite
- Gabbro - Dolerite - Granite
- Granite - Diorite - Gabbro
- Granite - Gabbro - Dolerite
- Gabbro - Granite - Diorite
15. Which of these has a 'Glassy' Texture
- Peridotite
- Andersite
- Rhyolite
- Obsidean
- Pumice
16. Rocks containing a lot of Silica (SiO3) Create what kind of lava?
- None of these
- They can form different types of lava
- Thick, slow moving lava
- Runny, fast moving lava
- They don
17. What are fragments of foreign rock in igneous bodies called?
- Xenoliths
- Columnars
- Pyroclasts
- Vesicles
- Ooliths
18. Viscous Lava is likely to create what kind of volcano?
- No Volcanoes
- Composite (Strato) Volcanoes
- Sheild Volcanoes
19. Mafic minerals include:
- Quartz, Olivine, Pyroxene
- Feldspar, Biotite Mica, Muscovite Mica
- Biotite Mica, Quartz, Feldspar
- Olivine, Pyroxene, Biotite Mica
- Feldspar, Quartz, Olivine