Also found in: Dictionary.


A granular hypabyssal rock composed principally of calcic plagioclase, augite, and sometimes hornblende, with some brotite and analcime.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



(from Teschen, the German name for the Polish city of Cieszyn), a plutonic rock; one of the alkalic gabbroids. Teschenite consists of basic plagioclase, augite, and analcime; it can also contain hornblende, other zeolites, and such accessory minerals as apatite and magnetite. The rock, whose texture is diabasic, forms small hypabyssal masses, dikes, and sills.

In the USSR, teschenite can be found in the Caucasus and in Southern Siberia (Minusinsk Basin). Teschenite is a beautiful ornamental stone.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.