Obsidian is formed from very rapidly cooling lava.
obsidian
cool rapidly
Obsidian
In reference to the cooling of magma into rock, basalt is formed from rapid cooling.
Obsidian is part of the Granite family of igneous rocks.
obsidian
cool rapidly
cool rapidly
Cool rapidly
Obsidian
Obsidian and Pāhoehoe lava
They cool to quickly for crystals to form.
Obsidian rocks are cooled very fast, and you cannot see the crystals in them.
In reference to the cooling of magma into rock, basalt is formed from rapid cooling.
Yes the Obsidian does cool quickly and the vesicular basalt
Extrusive igneous rocks, like basalt, pumice, scoria, obsidian, and rhyolite.
Obsidian is part of the Granite family of igneous rocks.