Baskett R J Middle School
125 N. Broadway St.
Gas City, IN 46933
(765) 674-8536
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Obsidian
One of the neatest (I think) type of Igneous rocks is Obsidian. It's a black, glassy-looking rock that forms when certain lava cools rapidly. |
Snowflake Obsidian
One of the variations of Obsidian is Snowflake Obsidian. It's pretty obvious from the picture why it's called that. |
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Porphyitic Basalt
Basalt is one of the most abundant forms of rock in the Earth's crust because it's at the bottom of most of the oceans. Here is one form of Basalt.
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