Igneous rocks are the "new kids" in the rock cycle. They're the new rock on the block, ready to start fresh. Basalt lava flow in Hawaii, a perfect example of an extrusive igneous rock.

These rocks really shouldn't be there. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. The surprising discovery of volcanic, "igneous ...

Pumice is an example of extrusive igneous rock. The word extrusive means that the magma was forced onto the earth's surface and cooled in a matter of hours. Granite is an example of intrusive ...

Approximately 4.5 billion years ago, prior to the formation of a solid inner core, the planet was believed to be a huge blob of liquefied rock. In the course of time, this molten mess grew a ...

WITH the collaboration of Dr. A. K. Wells, this well-known text-book has been revised and extended until now it is virtually a new book. Among the new features are chapters dealing with the ...

This action is believed to account directly or indirectly for many varieties of igneous rock. Igneous Rocks and their Origin. By Prof. R. A. Daly. Pp. xxii + 563.