Obsidian is an extrusive rock that is created when magma from underneath the Earth"s tardy breaches and becomes lava. As soon as the lava beginning cooling, the solidifies and also elements room frozen, providing the rock its glassy appearance.

You are watching: Under which condition below would you expect a glassy extrusive rock like obsidian to form





Quick cooling ~ above earth’s surface ar is the condition that youwould intend a glassy extrusive rock like obsidian come form.

 

To add, one obsidian is a naturally arising volcanic glass formedas an extrusive igneous rock. The is made once felsic lava emitted indigenous avolcano cools promptly with minimal crystal growth.



Hihi!The correct answer would certainly be D. Rapid cooling ~ above Earth"s surface! Obsidian isa volcanic rock formed by the rapid solidification the lava there is no crystallization!I hope i helped!-Loliarual
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