Tachylite

Description

A vitrous form of Obsidian. Tachylite is formed when molten Basalt cools rapidly. It is black or dark brown glassy material that contains veins or masses or other minerals.

Synonyms and Related Terms

tachylyte

Other Properties

Brittle with conchoidal fracture.

Sources Checked for Data in Record

• G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 641

• Wikipedia, the free encyclopedia, at http://www.wikipedia.com Comment: http://en.wikipedia.org/wiki/Tachylite (Accessed Sept. 28, 2005)