Extrusive Rocks

12/05/24

“What happens when lava cools in rocks?”

Lava is a powerful, hot, liquid substance. When it comes to the Earth’s surface and cools, it can solidify into rock. This becomes a type of igneous rock called Extrusive Rocks. Extrusive rocks have large crystalline structure sizes that can be seen by normal human sight and a lack of flow texture. Extrusive rocks have small, even microscopic crystal sizes because of the quick cooling. Examples of extrusive rocks include basalt and obsidian.

Image credit: http://www.britannica.com