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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