jalyn243
jalyn243 jalyn243
  • 21-09-2016
  • Physics
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what are two extrusive rocks

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WorldlyGlass49
WorldlyGlass49 WorldlyGlass49
  • 21-09-2016
Extrusive igneous rocks form when magma reaches the Earth's surface a volcano and cools quickly. Most extrusive (volcanic) rocks have small crystals. Examples include basalt, rhyolite, andesite, and obsidian.
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