Earth Science







How Obsidian is Formed

Obsidian is a volcanic glass. It forms when lava that contains large amounts of silica cools without forming crystals. This generally happens when a volcano extrudes lava, rather than deep within the magma chamber. Obsidian is usually black, but can…
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Avalanche Survival

Being Colorado native I’ve seen a couple of avalanches. I’ve never experienced one personally, though. It is quite an awesome experience to watch an avalanche, as long as you are far away. When a huge snow mass comes down a…
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