92 COKUNDUM IN THE UNITED STATES. [bull. 180. 
The occurrence of sapphire corundum in Burma, Ceylon, and Siam 
has been mentioned on pages 39 and 46. 
Zirkel, 1 mentions the occurrence of corundum as an accessor} 7 min- 
eral in the amphi oolites of northwestern Austrian Silesia; in the 
chlorite-schist of Nischne-Issetsk, in the Urals; as a contact product 
of the diorites of Klausen, in Tyrol; in the andesite and tonalite of 
the Eifel; in a contact product of quartz-mica-diorite on quart z- 
phyllite in Val Moja, and similarly in the kersantite of Michaelstein, 
liar/; also in the graphite of Muhldorf, near Spitz, in Lower Austria. 
Pirsson 2 has mentioned the occurrence of corundum in small blue 
sapphires in the fresh basalt of Unkel on the Rhine and Steinheim 
near Frankfort on the Main. 
Morozewicz 3 has described the occurrences of corundum in Russia, 
the chief of which is in a rock composed essentially of anorthite and 
corundum, together with spinel and biotite. He claims that this is a 
new type of alumino-silicate rock, and calls it "kysehtymit." Other 
rocks in the Urals that contain corundum are made up almost exclu- 
sively of this mineral and orthoclase ; some of these are coarse grained, 
while others are fine. The coarse ones have been called corundum- 
pegmatite and the finer ones corundum-syenite. These rocks occur 
as dikes cutting through gneiss. 
It may be that when these corundum-bearing rocks of the Urals 
have been more specially examined as to their economic value they 
may be found to contain a large enough percentage of corundum to 
make them of importance as an ore of this mineral. 
Dana 4 mentions the occurrence of corundum near Canton, China; 
in Bohemia, near Petschau; at Saint Gotthard, in dolomite; near 
Mozzo, in Piedmont, in white compact feldspar; and at Mudgee, New 
South Wales. 
Lacroix, in a paper 5 on the metamorphic and eruptive rocks of 
Ariege, France, mentions the occurrence of corundum in the marbles 
of Mercus and Arignac. In a second paper 6 on acid inclusions in the 
volcanic rocks of the Auvergne, France, corundum is said to occur 
frequently in the granites and gneisses of this section. He has also 
described the occurrence of this mineral in the basic magmas (basalts, 
trachytes, and andesites) in Haute-Loire, France. 7 
Salomon 8 has described the occurrence of corundum in phyllites, 
epidote-amphibolites, and mica-schists at Mount Aviolo, in the 
Southern Alps. It occurs but sparingly in these rocks. 
1 Lehrbuch der Petrographie, Leipsic, 1893, p. 461. 
2 Am. Jour. Sci. , 4th series, Vol. IV, 1897, p. 422. 
3 Tschermaks Min.und Pet. Mitt., Vol. XVIII, pt. 1; and Rept. Bureau of Mines, Toronto, Vol. 
VIII, Part II, 1899, p. 285. 
4 Min., 6th edition, 1892, p. 212. 
5 Bull, des Serv. d. 1. Carte geol. d. France, No. 11, Vol. II; and Am. Nat., Feb., 1891, pp. 1:58-139. 
6 Loc.<it. 
7 Bull. Soc. Min, Vol. XIII. . L890, pp. 100-106. 
8 Jour. d. d. G. Gk, Vol. XLII., 1890, p. 450; and Am. Nat., 1891, pp. 571,572. 
