INDEX TO ROCKS. 
Page. 
Absarokite 97, 99, 103 
Acmite-trachy te 123 
Actinolite-magnetite-schist 83 
Adinole 69 
Adobe soil 302, 303 
Alaskite 228 
Albite 21, 23, 34 
Aleutite 229 
Amphibole 116, 190, 206, 208 
Amphibole-biotite-granite 208 
Amphibole-gabbro 206 
Amphibole-schist 217 
Amphibolite 27, 31, 32, 66, 197 
Amygdaloid 53 
Analcite 34,146 
Analcite-basalt 146 
Andalusite-hornf els 210 
Andalusite-schist 210 
Andesite 19, 
51, 90, 91, 97, 98, 108, 109, 114, 
119, 141, 145, 148, 153, 166, 170, 
171, 174, 176, 181, 182, 183, 188, 
191, 193, 203, 212, 222, 226, 227 
Andesite-basalt 176 
Andesite-perlite 175 
Andesite-porphyry 119 
Anorthoclase 77, 123 
Anorthosite 36,37 
Aplite 94, 129, 192, 207, 229 
Aporhyolite 40 
Argillite 195,196 
Arkose-gneiss 33 
Asperite 212 
Augite 63,140,146,170 
Augite-aleutite 229 
Augite-andesite 98, 141 
Augite-andesite-porphyry 89, 93 
Augite-belugite 229 
Augite-bronzite-andesite 226 
Augite-diorite 147, 161, 164 
Augite-granite 198 
Augite-latite 205 
Augite-mica-syenite 140 
Bull. 168 20 
Page. 
Augite-microcline-granite 55 
Augite- oligoclase-scapolite-biotite 
rock 229 
Augite-porphyrite 1 67 
Augite-porphyry 112 
Augite-syenite 95, 204 
Augite-syenite-porphyry 95 
Augite-vogesite 130 
Banakite 101,102 
Barkevikite 133 
Basalt 35,39, 
61, 62, 63, 68, 92, 109, 110, 111, 113, 
130, 132, 138, 140, 144, 145,146,169, 
170,171,173, 175, 176, 184, 185, 186, 
189, 191, 202, 218, 220, 222, 223, 225 
Basanite 61, 171 
Belugite 229 
Biotite 116 
Biotite-augite-latite 205 
Biotite-diorite 44 
Biotite-gneiss 72 
Biotite-granite 30, 46, 47, 208 
Biotite-porpbyrite 155 
Biotite-quartz-inonzonite 192 
Biotite-trachyte 98 
Boltonite 33 
Bostonite 19 
Bronzite 43 
Bronzite-norite 67 
Camptonite 23, 26, 110, 162, 163, 197 
Cancrinite 22 
Cement rock 253,257,259 
Chert 250 
Chiastolite-schist 210 
Chloritic gneiss 48 
Chloritic granite 27 
Clay 289, 290, 291, 292, 293, 294, 
295, 296, 297, 298, 300, 301, 303, 304 
Clay slate 284,288 
Coquina 255 
Coral 256 
Coral rock 255,256,277 
Cordierite-hornfels 26 
305 
