374 
INDEX TO EOCKS. 
Page. 
Minnesotase - c - 242 
Missourite I 49 
Monchiquite 70, 144, 146, 148 
Monchiquose 139,144,148,165 
Monzonase 80, 261 
Monzonite 109 > 
132, 133, 135, 149,152,154,155,156,158, 
180, 181, 182, 188, 190, 197, 199, 206, 233 
Monzonitic porphyry 183, 290 
Monzonose 66, 105, 117, 118, 128, 142, 
144, 147, 152, 164, 170, 181, 190,201,238 
IN". 
Nepheline-basalt 72, 73, 163 
Nepheline-basanite 195 
Nepheline-melilite-basalt 73 
Nepheline-syenite 47, 163 
Nepheline-tephrite 187 
Nephelite (elseolite) 24,26 
Nevadi te 175 
Nordmarkite 27, 28 
Nordmarkose 24, 75, 114, 140, 152, 191, 1 9 1 . 272 
N, ,rite 43, 44, 45, 53, 79, 101 
Noselite-syenite porphyry 191 
Novaculite 77 
O. 
Obsidian 120, 134, 196, 246, 251 , 254 
Olivine 66, 95, 256, 282 
Olivine-basalt 42. 206, 222, 252 
Olivine-diabase 88, 1 98, 265 
Olivine-gabbro 52, 95, 139, 239 
Omeose 161 , 1 68, 1 90 
Oolitic sand 331 
Orendase 61 
Orendite 100 
Orendose 99, 100 
Ornose 23,38,224,227,245,247 
Orthoclase 174 
Orthoclase-gabbro-diorite 109 
Ottrelite-phyllite 59 
Ouachitite 70 
Ourose 146 
Paisanite 27, 28 
Palagonite 40 
Pantellerite 70 
Pantellerose 75, 202 
Peridotite 31, 46, 66, 68, 76, 130, 166, 224, 256, 272 
Perkni te 242 
Perlite 124,205 
Phlegrose 27, 28, 166, 191 
Phlogopite 99 
Phonolite 37, 72, 98, 162, 163, 194 
Phonolitie andesite 194 
Phthanite 350 
Phyllite 29 
Picrite 79, 130, 141, 242 
Picrite porphyry 79 
Pitchstone 42, 134, 145, 169, 192 
Placerose 230, 231, 236, 267, 274 
Plagioclase-basalt 70, 164, 195, 272 
Plagioelase-gneiss 234 
Plagioclase-sca polite-biotite rock 270 
Page. 
Porphyrite 128, 137, 138, 174, 179, 232 
Porphyrite-diorite 179 
Porphyry 69, 75, 89, 102, 173, 174, 189, 190, 200 
Prowersose 1 186 
Pseudo-diabase 245 
Pseudo-diorite 245 
Pseudo-leucite-sodalite-tinguaite 153 
Pseudoleucite-syenite 149 
Pulaskite 75, 191 
Pulaskose 102, 114, 118, 147, 150, 164, 166, 1('»7 
Pumice 25 1 , 274 
Pyroxene 127, 186, 187, 253 
Pyroxene-andesite . . . 106, 121, 125, 164, 184, 195, 214 
Pyroxene-biotite-andesite 204 
Pyroxene-mica-diorite 103 
Pyroxene porphyry 103 
Pyroxenite 50, 63, 130, 247 
Q. 
Quartz-alunite rock 170 
Quartz-andesite 226 
Quartz-banakite 118 
Quartz-basalt 217, 218 
Quartz-biotite-garnet-gneiss . 46 
Quartz-diabase 40 
Quartz-diaspore rock 170 
Quartz-diorite 65, 138, 155, 223 
Quartz-diorite-gneiss 233 
( Quartz-diorite- porphyry 225 
Quartz-gabbro 65 
(niaitz-hornblende-mica-porphyrite 176 
Quartzite 90, 91, 92 
Quartz-keratophyre 89 
Quartz-latite 184 
Quartz-mica-diorite 104, 110, 198, 225, 243 
Quartz-mica-diorite porphyry 105, 110 
Quartz-mica-hornblende-diorite 53 
Quartz-monzonite 132, 1 33, 
135,154, 155, L56, 158, 180, 182, 197, 199,2:53,242 
Quartz-muscovite rock 206, 208 
Quartz-norite-gneiss 97 
Quartz-pan tellerite 70 
Quartz-porphyrite 176, 179, 227 
Quartz-porphyrite-schist 233 
Quartz porphyry 48, 62, 84, 134, 141, 145, 188j 267 
Quartz-pyroxene-diorite 237 
Quartz-pyroxene-mica-diorite 103 
Quartz-schist 59 
Quartz-syenite Ill, 152 
Quartz-syenite porphyry 143, 152 
Quartz-tourmaline porphyry 145 
Quartz-trachyte 22 
Rhyolite 23, 62, 63, 74, 120, 
121, 122, 134, 136, 145, 157, 168, 171, 175, 178, 180, 
185, 188, 192, 205, 207, 208, 211, 233, 254, 256, 257 
Rhyolite-dacite obsidian 134 
Rhyolite-pitchstone 145 
Rhyolite porphyry 131 
Rhyolitic glass 131, 171, 192 
Rhyolitic obsidian 251 
Rhyolitic perlite 124 
Rhyolitic tuff 146, 169, 211 
Rhyolitic vitrophyre 180, 182 
