Am &W NN -& 
THE CLASSIFICATION OF THE IGNEOUS ROCKS Bi, 
Gabbro 
. Anorthosite, Nain, Labrador. Zeitsch. d. d. geol. Gesell. 1884. 
. Orthoclose-Gabbro, Duluth, Minn. Neues Jahrb. f. Min. 1876, p. 117. 
. Gabbro, Northwestern Minn. C. & H. p. 112. 
. Garnetiferous Gabbro, Granite Falls, Minn. C. & H. p. 113. 
. Gabbro, Nahant, Mass. Jour. Geol. 7, p. 63. 
. Hypersthene-Gabbro, Baltimore, Md. Bull. U. S. Geol. Survey, No. 28, 
P- 39: 
. Norite, Montrose Point, Hudson River, N. Y. Am. Jour. Sci. (3) 22, 
p- 104. 
8. Norite, Ivrea, Piedmont. R. p. 151. 
WN 4 
. Forellenstein, Neurode, Silesia. /dzd. 
. Forellenstein, Coverack, Cornwall. Jézd. 
ULTRA-BASIC ROCKS 
Pyroxentte 
. Websterite, Webster, N.C. C. & H. p. 92. 
. Bronzite-Diallage Rock, Hebbville, Md. C. & H. p. 84. 
. Hornblende-Hypersthene Rock, Gallatin Co., Mont. C. & H. p. 140. 
. Websterite, Johnny Cake Road, Md. R. p. 165. 
Peridotite 
1. Mica-Peridotite, Crittenden Co., Ky. C. & H. p. 94. 
Nv 
NI Dum fw 
. Scyelite, Achavarasdale Moor, Caithness. Quart. Jour. Geol. Soc. 41, 
p- 402. 
. Wehrlite, Red Bluff, Gallatin Co,, Mont. C, & H. p. 140. 
. Lherzolite, Johnny Cake Road, Baltimore Co,, Md. R. 165. 
. Saxonite, Douglas Co., Oregon. C, & H. p. 231. 
Cortlandtite (Schillerfels) Schriesheim, Odenwald, Hesse. R. p. 165. 
Bronzite Diallage Peridotite, Howardville, Md, Bull. U.S. Geol. Survey, 
Now28,) p54: 
. Dunite, Dun Mts., New Zealand. R. p, 165. 
9. Dunite, Elliott €o., Ky. C. & H. p. 93. 
ut 
Rare Rock Types 
. Rockallite, Rockall Bank, Atlantic. Geol. Mag. (4) 6, p. 165. 1899. 
. Basic Nephelene-Syenite, Beemerville, N. J. Trans. N. Y. Acad. Sci. 11, 
p. 86. 
. Urtite, Lujaur Urt, Kola Peninsula, Russia. Geol. Féren, Forh, 18, p. 
462. 1806. 
. Ijolite, liwaara, Finland, and Umptek, Kola Peninsula, Russia. /dzd. 
13, p. 300. 1891. 
. Missourite, Highwood Mts., Mont. Am. Jour. Sci. (4) 2, p. 315. 1896. 
. Dunite, Elliott Co., Ky. Bull. 38 U.S. Geol. Survey, p. 24. 1887. 
