bjaneChk9eishah bjaneChk9eishah
  • 19-05-2017
  • Biology
contestada

Under which condition below would you expect a glassy extrusive rock like obsidian to form

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Frankeinstein Frankeinstein
  • 26-05-2017
Obsidian is an extrusive rock that is formed when magma from underneath the Earth's crust breaches and becomes lava. Once the lava starts cooling, it solidifies and elements are frozen, giving the rock its glassy appearance.
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minecraftableco
minecraftableco minecraftableco
  • 01-06-2017
Quick cooling on earths surface
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