The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.
(from the ancient Roman name for Vienna, “Vindobona”), a combining term for the Helvetian and Tortonian formations of the Neocene system (period), proposed by the French geologist Charles Deperet in 1893.
The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.