The American Naturalist, Volumen21Essex Institute, 1887 |
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Página 622
... islands , or the structure and growth of a common volcanic cone , or the effects of erosion in cutting through a series of hard and soft stratified rocks , and the relation of dykes to eruptive sheets , to volcanic lava - beds or ...
... islands , or the structure and growth of a common volcanic cone , or the effects of erosion in cutting through a series of hard and soft stratified rocks , and the relation of dykes to eruptive sheets , to volcanic lava - beds or ...
Página 623
... Islands , and by means of the grand eruptions recorded of Skap- tar Jokul , to gain a conception of fissure eruptions and the nature of the vast lava - fields covering now such large tracts of the sur- face , but without the conical ...
... Islands , and by means of the grand eruptions recorded of Skap- tar Jokul , to gain a conception of fissure eruptions and the nature of the vast lava - fields covering now such large tracts of the sur- face , but without the conical ...
Página 632
... Islands ) scapulæ , which have the extraordinary means of 78.8 for the scapular index and 117 for the infra - spinous . He found the variations in the scapular index of African blacks , male and female , to range from 57 to 81 , and the ...
... Islands ) scapulæ , which have the extraordinary means of 78.8 for the scapular index and 117 for the infra - spinous . He found the variations in the scapular index of African blacks , male and female , to range from 57 to 81 , and the ...
Página 655
... island of Michipicoten these conglomerates are well exposed , and a careful study of their pebbles shows that they can all be referred to some one or other of the formations now visible along the north shore of the lake . The same ...
... island of Michipicoten these conglomerates are well exposed , and a careful study of their pebbles shows that they can all be referred to some one or other of the formations now visible along the north shore of the lake . The same ...
Página 656
... Island , at the western limit of the bay . The section shows only augite and labradorite in ordinary light . FIG . 5. Pseudomorphs of chlorite after mica . FIG . 6. A baveno twin of orthoclase from a granite . FIG . 7. Diabase ...
... Island , at the western limit of the bay . The section shows only augite and labradorite in ordinary light . FIG . 5. Pseudomorphs of chlorite after mica . FIG . 6. A baveno twin of orthoclase from a granite . FIG . 7. Diabase ...
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Amer AMERICAN NATURALIST animals appear Artiodactyla Bering Island bones botany breed called cells character chemical color compounds conclusions Condylarthra contains crystals cusps described dike E. D. Cope Eocene evolution eyes facts fauna feet figures fossils four Gard genera genus geological geologists geology Göhrde groups Heptodon hornblende hornless stags horns hundred Hyracotherium Ichthyosaurus incisors inferior molar infra-spinous insects Island J. B. LIPPINCOTT COMPANY known Lambdotherium larvæ lower Menodus mineral Miocene molars natural North notes observed occur original paper Philadelphia plane plants plates polled cattle pollinia portion premolars present probably Proc Prof Professor Protohippus published recently region represented River rocks sandstone says scapular scapular index schists scientific sea-cow sections seen side skull species specimens Spiders structure student superior molars synonymy Taconic teeth tion varieties Vilmorin XXI.-NO