The American Naturalist, Volumen30Essex Institute, 1896 |
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Página v
... Porphyrites and Porphyritic Struc- ture , 128 ; Granophyre of Carrock Fell , England , 129 ; Sheet and Neck Basalts in the Lausite , 129 ; The Eruptives of Missouri , 207 ; Rocks from Eastern Africa , 208 ; A Basic Rock Derived from ...
... Porphyrites and Porphyritic Struc- ture , 128 ; Granophyre of Carrock Fell , England , 129 ; Sheet and Neck Basalts in the Lausite , 129 ; The Eruptives of Missouri , 207 ; Rocks from Eastern Africa , 208 ; A Basic Rock Derived from ...
Página xxiii
... Porphyrites and Porphyritic Group , Flora of ............ Qimplements . 873 , 976 UARRY Workshop and its 305 Structure ...... 128 Quartz , Gold bearing , of Cali- Portheus australis ..... 137 fornia ....... 52 Polar Hares ........ 234 ...
... Porphyrites and Porphyritic Group , Flora of ............ Qimplements . 873 , 976 UARRY Workshop and its 305 Structure ...... 128 Quartz , Gold bearing , of Cali- Portheus australis ..... 137 fornia ....... 52 Polar Hares ........ 234 ...
Página 127
... porphyrites among the dyke forms . In some of the quartz - porphyries perlitic cracks may still be recognized , and ... porphyrite has a groundmass of idiomorphic hornblende 1896. ] 127 Petrography .
... porphyrites among the dyke forms . In some of the quartz - porphyries perlitic cracks may still be recognized , and ... porphyrite has a groundmass of idiomorphic hornblende 1896. ] 127 Petrography .
Página 128
... Porphyrites and the Porphyritic Structure . In a general account of the laccolitic mountains of Colorado , Utah and Arizona , Cross ' gives a brief synopsis of the characteristics of the rocks that con- stitute their cores . These rocks ...
... Porphyrites and the Porphyritic Structure . In a general account of the laccolitic mountains of Colorado , Utah and Arizona , Cross ' gives a brief synopsis of the characteristics of the rocks that con- stitute their cores . These rocks ...
Página 207
... porphyrites , quartz - diabase- 1Edited by Dr. W. S. Bayley , Colby University , Waterville , Me . Mo. Geol . Survey , Vol . VIII , 1895 , p . 83-222 . In porphyrites and melaphyres . The author unfortunately classes as 1896. ] 207 ...
... porphyrites , quartz - diabase- 1Edited by Dr. W. S. Bayley , Colby University , Waterville , Me . Mo. Geol . Survey , Vol . VIII , 1895 , p . 83-222 . In porphyrites and melaphyres . The author unfortunately classes as 1896. ] 207 ...
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