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Updated: May 20, 2025
Hibbert's work is illustrated by very carefully drawn and accurate views of some of the old cones and craters of this district, accompanied by detailed descriptions. The lava of Schorenberg, near Rieden, is interesting from the fact, stated by Zirkel, that it contains leucite, nosean, and nephelin. Die Mikros. Beschaf. d. Miner. u. Gesteine, p. 154 . Hibbert, loc. cit., p. 23.
It is called by Zirkel Sanidin-Leucitgestein. We have fortunately abundant means of comparison, as the lavas of these two mountains have been submitted to close examination by petrologists. In the case of the Vesuvian lavas, an elaborate series of chemical analyses and microscopical observations have been made by the Rev.
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