i66 ALBERT JOHANNSEN 



character. Roth^ called the same rocks liparites, from the Lipari 

 Islands, where they occur. 



Syn, : Liparite Roth. 



Nevadite von Richthofen. Nevadite is a variety of 

 rhyolite with very abundant phenocrysts and very Httle ground- 

 mass. It was named by von Richthofen^ from its occurrence in 

 Nevada. 



(228) AdamelUte Cathrein-Brogger. The term adamelhte 



is here given to quartz-monzonites. It was originally used by 

 Cathrein^ for rocks from Adamello which contain both orthoclase 

 and plagioclase. Speaking of these rocks he says: "Er ist ein 

 lichtes, schon im Aussehen mehr den Graniten als Dioriten sich 

 naherndes Gestein." Brogger^ uses the name for acid quartz- 

 monzonites, and Balls ^rnd Hatch^ use it for quartz-monzonite. 

 Syn.: Quartz-monzonite Brogger. 



Windsorite Daly.'' This is a quartz-poor quartz- 

 monzonite dike-rock. 



Dellenite Brogger. The rock intermediate between 

 dacite and rhyolite from Dellen, Helsingland, Sweden, was named 

 dellenite by Brogger,^ and the term is here used for the extrusive 

 equivalent of quartz-monzonite." Since it consists of a single 

 word it is preferable to quartz-latite. 



Syn.: Quartz-latite Ransome,' Dacite-liparite 

 Brogger.^" 



^Justus Roth, Gesteinsanalysen, xxxiv (1861). 



2 F. Baron von Richthofen, " Principles of the Natural System of Volcanic Rocks," 

 Mem. Cat. Acad. Sci., I (1868), Part II, p. 16. 



3 A. Cathrein, "Zur Diinnschliffsammlung der Tiroler Eruptivgesteine," Neties 

 Jahrb., I (1890), 74. 



4 W. C. Brogger, Die Eruptivgesteine des Kristianiagebietes. II: Die Eruptionsfolge 

 der triadiscken Eruptivgesteine bei Predazzo in SUdtyrol (Kristiania, 1895), p. 61. 



s Sydney H. Ball, "General Geology of the Georgetown Quadrangle, Colorado," 

 U.S. Geol. Surv. Wash., Prof. Paper 63 (1908), p. 51. 



6 F. H. Hatch, The Petrology of the Igneous Rocks (London, 1914), P- 176- 



7 R. A. Daly, "The Geology of Ascutney Mountain, Vermont," U.S. Geol. Surv., 

 Bull. 209 (1903), p. 46. 



8 W. C. Brogger, Die Eruptivgesteine des Kristianiagebietes. II: Die Eruptionsfolge 

 der triadischen Eruptivgesteine bei Predazzo in SUdtyrol (Kristiania, 1895), p. 59, note. 



9 F. Leslie Ransome, " Some Lava Flows of the Western Slope of the Sierra Nevada, 

 California," ^me;-. /wr. 5a., V (1898), 372. 



^0 W. C. Brogger, op. cit., p. 60. 



