Historical reference: Do not rely on this information. It is very old. About this collection
Andesite, a name applied by Von Buch to certain lavas in the Andes, consisting of plagioclase felspar, generally either andesine or oligoclase (q.v.), with hornblende, with or without quartz, and generally with some magnetite. They are of Tertiary age, and are well represented in Hungary.