sevendixon98
sevendixon98 sevendixon98
  • 24-05-2017
  • Physics
contestada

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

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BlueSky06
BlueSky06 BlueSky06
  • 07-06-2017

Quick cooling on earth’s surface is the condition that you would expect a glassy extrusive rock like obsidian to form.

 

To add, an obsidian is a naturally occurring volcanic glass formed as an extrusive igneous rock. It is made when felsic lava emitted from a volcano cools swiftly with minimal crystal growth.

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