The American Naturalist, Том 21Essex Institute, 1887 |
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Стр. 655
... hornblende becomes exceedingly like augite in appearance and polarization . Much that has been called diorite - slate and diabase - schist , when carefully studied , can be analyzed into various intrusive diorites , closely assimilated ...
... hornblende becomes exceedingly like augite in appearance and polarization . Much that has been called diorite - slate and diabase - schist , when carefully studied , can be analyzed into various intrusive diorites , closely assimilated ...
Стр. 660
... hornblende rocks which occur as intrusive sheets and bosses in the limestones and quartzites of the Assynt district in Scotland . From the description which the ... hornblende porphyrites the hornblende crys- tals 660 [ July General Notes .
... hornblende rocks which occur as intrusive sheets and bosses in the limestones and quartzites of the Assynt district in Scotland . From the description which the ... hornblende porphyrites the hornblende crys- tals 660 [ July General Notes .
Стр. 661
growths . In the hornblende porphyrites the hornblende crys- tals are less abundant . This class is characterized by the presence of feldspar in two generations . The porphyritic crystals are sharply outlined , and are developed in ...
growths . In the hornblende porphyrites the hornblende crys- tals are less abundant . This class is characterized by the presence of feldspar in two generations . The porphyritic crystals are sharply outlined , and are developed in ...
Стр. 762
... hornblende , glaucophane , and dust , a green hornblende , glaucophane both in irregular grains and in well - developed crystals , epidote , mica , and sphene ( leu- coxene ) . In this connection the author describes in some detail the ...
... hornblende , glaucophane , and dust , a green hornblende , glaucophane both in irregular grains and in well - developed crystals , epidote , mica , and sphene ( leu- coxene ) . In this connection the author describes in some detail the ...
Стр. 849
... hornblende take place in such a manner that the axes ɓ and c ' of the former are parallel with c ' and ɓ of the latter . The hornblende in the rock often shows a parting parallel to op . In the Neues Jahrbuch Cathrein describes six ...
... hornblende take place in such a manner that the axes ɓ and c ' of the former are parallel with c ' and ɓ of the latter . The hornblende in the rock often shows a parting parallel to op . In the Neues Jahrbuch Cathrein describes six ...
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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