Proceedings of the Geologists' Association, 10 tomasGeologists' Association, London., 1889 |
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60 psl.
... felspar also undergoes modifi- cation ; that a pale brown mica is very frequently developed ; and that , occasionally , such minerals as axinite , tourmaline , and garnet make their appearance . Lossen has shown that precisely similar ...
... felspar also undergoes modifi- cation ; that a pale brown mica is very frequently developed ; and that , occasionally , such minerals as axinite , tourmaline , and garnet make their appearance . Lossen has shown that precisely similar ...
61 psl.
... felspar of the basic igneous rocks is labradorite , or bytownite . The synthetic experiments of Messrs . Fouqué and Lévy make it highly probable that the ophitic structure , so common in this group , is dependent on the presence ...
... felspar of the basic igneous rocks is labradorite , or bytownite . The synthetic experiments of Messrs . Fouqué and Lévy make it highly probable that the ophitic structure , so common in this group , is dependent on the presence ...
62 psl.
... felspar by a water - clear mosaic of small grains , for the most part devoid of twin striation . The connection between the development of the mosaic and the straining of the original mineral is admirably illustrated in some of the ...
... felspar by a water - clear mosaic of small grains , for the most part devoid of twin striation . The connection between the development of the mosaic and the straining of the original mineral is admirably illustrated in some of the ...
63 psl.
... felspar , malacolite , an unknown substance , which is white by reflected , and brown by transmitted light , and minute granules of sphene . Mr. Adams * has shown that the felspars of certain actinolitic schists occurring in the Quebec ...
... felspar , malacolite , an unknown substance , which is white by reflected , and brown by transmitted light , and minute granules of sphene . Mr. Adams * has shown that the felspars of certain actinolitic schists occurring in the Quebec ...
64 psl.
... felspar . When the hornblende consists of grains or crystals having perfectly definite cleavage and uniform optic characters , it is said to be " compact . " Secondary hornblende of all kinds is usually green . Brown tints may , however ...
... felspar . When the hornblende consists of grains or crystals having perfectly definite cleavage and uniform optic characters , it is said to be " compact . " Secondary hornblende of all kinds is usually green . Brown tints may , however ...
Kiti leidimai - Peržiūrėti viską
Proceedings of the Geologists' Association, 30 tomas Geologists' Association Visos knygos peržiūra - 1919 |
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Pagrindiniai terminai ir frazės
Agass Agassiz appears Arca Arcida Association augite beds bones Boulder Clay British Museum Carboniferous character collection Cornwall Cretaceous crystals deposits described Devonian Director district Dixon dorsal English Chalk Eocene Excursion exhibited feet felspar fins fish flint formation Foss fossils fragments genera genus Geol Geological Society Geological Survey geologists granite gravel Greensand Gypsum Hill hornblende inches interest Journ known later less Lias Limestone London Clay Mantell margin marls mass maxilla McCoy Members mineral Nucula Nucula sp occur original Ornithocheirus Owen Paleozoic party pebble-bed pebbles Phill placed plagioclase Poiss portion premaxilla present Proc Prof Pterodactyl quarry quartz Reading Beds referred remains remarkable Rhætic roads rocks sand Sandstone schist seen shales silica Silurian skull South species specimens stone strata surface Suss teeth Tertiary Thanet thick tion tooth Trans upper valley vertebræ visited Wales Woodward
Populiarios ištraukos
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