The American Journal of Science and ArtsS. Converse, 1888 - Geology |
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Results 1-5 of 17
Page 74
... olivine , augite and nickeliferous iron . In the course of the analysis , from 2 to 2.5 per cent of the material taken remained unattacked by acids , and of this , 60 per cent , was amorphous carbon and 40 per cent resisted fusion in ...
... olivine , augite and nickeliferous iron . In the course of the analysis , from 2 to 2.5 per cent of the material taken remained unattacked by acids , and of this , 60 per cent , was amorphous carbon and 40 per cent resisted fusion in ...
Page 115
... olivine and enstatite , with considerable pyrrhotite , as is also shown by the microscopical description . The stone ... olivine and enstatite grains and chondri , imbedded in a fine granular groundmass of the same mineral composition ...
... olivine and enstatite , with considerable pyrrhotite , as is also shown by the microscopical description . The stone ... olivine and enstatite grains and chondri , imbedded in a fine granular groundmass of the same mineral composition ...
Page 116
... olivine and enstatite are nearly colorless or gray through enclo- sures of dust - like particles , and carry but few cavities . In addition to the minerals above mentioned there were no- ticed occasional broad , irregular plates of a ...
... olivine and enstatite are nearly colorless or gray through enclo- sures of dust - like particles , and carry but few cavities . In addition to the minerals above mentioned there were no- ticed occasional broad , irregular plates of a ...
Page 117
... olivine in composition , while the insoluble is evidently a mixture of the same insoluble constitu- ents as the mass of the meteorite . The filling material of the vein is , to the unaided eye , quite black and without luster ; under ...
... olivine in composition , while the insoluble is evidently a mixture of the same insoluble constitu- ents as the mass of the meteorite . The filling material of the vein is , to the unaided eye , quite black and without luster ; under ...
Page 118
... olivine and enstatite . On examining the walls of the vein , areas were observed where the gray and yellowish enstatites and olivines retained their normal properties at the distance of one or two millimeters , but at contact with the ...
... olivine and enstatite . On examining the walls of the vein , areas were observed where the gray and yellowish enstatites and olivines retained their normal properties at the distance of one or two millimeters , but at contact with the ...
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absorption Acad acid action albite alloys American amount analysis angle appears atoms augite biotite bolometer Botanical Notices Botany carbon cent character chemical Coan color cone crater crinoids crystals curve cycads deposits described determined diameter effect electrical Emmons eruption experiments fact fauna feet feldspar figure fissures Flora Flora Brasiliensis formation fossils Genera genus Geological gneiss heat Hilo Hooker hornblende hydrochloric acid iron Journ Journal Kilauea lava less light limestone magnetite mass measured metal mica miles mineral molecules mountain nearly North observed obtained occur paper pinnules plants plates platinum present prism Proc Prof Professor Puget quartz ratio region Report rocks schist sillimanite Silurian slates slit soil solar solution species specific rotation specimens spectrum staurolite steel stream summit surface Survey Taconic temperature thickness tion vapors viscous wave-lengths xenotime zircon