The American Journal of Science and ArtsS. Converse, 1888 - Geology |
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Page 58
... sillimanite are abundant , but they are arranged with- out apparent accordance with any law . They serve as a con- venient means of distinguishing most of the cordierite from the quartz , which it closely resembles . The axial figure is ...
... sillimanite are abundant , but they are arranged with- out apparent accordance with any law . They serve as a con- venient means of distinguishing most of the cordierite from the quartz , which it closely resembles . The axial figure is ...
Page 73
... sillimanite . It is distinguished , as in other cases , by its pleochroism . - C . R. , evi , 1546 , May , 1888 . 11. Zircon from North Carolina . - The recent demand for zir- conium , for use in the arts , has led to a systematic ...
... sillimanite . It is distinguished , as in other cases , by its pleochroism . - C . R. , evi , 1546 , May , 1888 . 11. Zircon from North Carolina . - The recent demand for zir- conium , for use in the arts , has led to a systematic ...
Page 255
... sillimanite , cyanite and garnet . The intensity of the meta- morphic changes is directly proportional to the nearness of the * This Journal , III , xx , p . 195 , Sept. , 1880 . schist to the massive rocks . Just at the contact.
... sillimanite , cyanite and garnet . The intensity of the meta- morphic changes is directly proportional to the nearness of the * This Journal , III , xx , p . 195 , Sept. , 1880 . schist to the massive rocks . Just at the contact.
Page 256
... sillimanite - formation , where this mineral has room for its complete development ( Pl . VI , fig . 2 ) . The base ... sillimanite , garnet and rutile . The sillimanite forms thick brownish individuals which break up into radiating ...
... sillimanite - formation , where this mineral has room for its complete development ( Pl . VI , fig . 2 ) . The base ... sillimanite , garnet and rutile . The sillimanite forms thick brownish individuals which break up into radiating ...
Page 257
... sillimanite , mica and garnet compose most of its substance . The sillimanite is arranged in radiating tufts made up of need- les so minute that their crowded aggregation is hardly trans- parent even in the thinnest sections . Around ...
... sillimanite , mica and garnet compose most of its substance . The sillimanite is arranged in radiating tufts made up of need- les so minute that their crowded aggregation is hardly trans- parent even in the thinnest sections . Around ...
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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