practical

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  • Created by: ra9718
  • Created on: 26-04-16 17:50

1. how is rhyolite formed?

  • Flow banding- crystallising parallel to flow. Rapid cooling means no crystals form in glassy layers
  • franja de flujo- cristalizar paralelo a fluir. El enfriamiento rápido significa que no se forman cristales en las capas vítreas
  • Rapid cooling means no crystals form in glassy layers
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Other questions in this quiz

2. what is the relationship between viscosity and the extent of lava flow if temperatures are the only variable?

  • when lavas are hotter, they are less viscous, so they travel further; and when lavas are cooler, they are more viscous so they will travel less far.
  • when lavas are cooler, they are less viscous, so they travel further; and when lavas are hotter, they are more viscous so they will travel less far.
  • when lavas are hotter, they are less viscous, so they travel further; and when lavas are cooler, they are more viscous so they will travel further.

3. where in the lava flow is the pahoehoe formed?

  • outside the lava flow
  • in the centre
  • in the edges

4. what measurements do you need to make?

  • Thickness of any bed and labelled correctly, alone
  • Thickness of any bed and labelled correctly, Dip of the left or right limb
  • fold axis/fold limb/mineral veins/joints/ hinges/fault/competent and incompetent bed

5. what is the formula to calculate the velocity of substance A and B at each temperature?

  • distance/velocity=time
  • velocity=distance/time
  • velocity/distance=time
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