Igneous rocks are formed from the cooling of molten ... The granite is polished, so it moves quickly and smoothly across the ice. 2. Decorative uses Obsidian can be carved into decorative figures.

Microbiologists have made a groundbreaking discovery in a 2-billion-year-old rock located in northeastern ... focused their research on the Bushveld Igneous Complex in northeastern South Africa.

The Journal of Geology, Vol. 23, No. 8, Supplement: The Later Stages of the Evolution of the Igneous Rocks (Nov. - Dec., 1915), pp. 1-91 (91 pages) ...