Rocks Classified and Described: A Treatise on LithologyLongmans, Green, and Company, 1866 - 425 páginas |
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Página 2
... mass ; never- theless , in the latter case , their separate existence may be generally recognised by magnifying power . The first and principal requisite for the student of Lithology is to be able to recognise and determine the minerals ...
... mass ; never- theless , in the latter case , their separate existence may be generally recognised by magnifying power . The first and principal requisite for the student of Lithology is to be able to recognise and determine the minerals ...
Página 5
... excep- tionally , in some kinds of granite ( e.g. St. Austell , Cornwall ) , it is perfectly crystallised . ( 7 ) As accessory constituent mass of some rocks QUARTZ . 5 Oxygen Compounds A Oxides of Silicon and Aluminum (Earths)
... excep- tionally , in some kinds of granite ( e.g. St. Austell , Cornwall ) , it is perfectly crystallised . ( 7 ) As accessory constituent mass of some rocks QUARTZ . 5 Oxygen Compounds A Oxides of Silicon and Aluminum (Earths)
Página 6
... mass of some rocks ( such as crystalline schists ) , in form of veins and swellings , or clothing the interior of ... masses ( ball - jasper ) coloured red by the peroxide of iron ; found in the bog iron - ore of Briesgau , in Germany ...
... mass of some rocks ( such as crystalline schists ) , in form of veins and swellings , or clothing the interior of ... masses ( ball - jasper ) coloured red by the peroxide of iron ; found in the bog iron - ore of Briesgau , in Germany ...
Página 18
... mass , with splintery fracture . Cp . very variable , sometimes that of tremolite . It is not a rigidly - defined ... masses . Cleavage prismatic , but usually less perfect than hornblende . Fracture conchoidal to uneven . H. = 5—6 ...
... mass , with splintery fracture . Cp . very variable , sometimes that of tremolite . It is not a rigidly - defined ... masses . Cleavage prismatic , but usually less perfect than hornblende . Fracture conchoidal to uneven . H. = 5—6 ...
Página 21
... mass ac- cording to the conditions under which it cooled and solidified . The origin both of hornblende and of pyroxene may be of various kinds . The possibility of their formation by wet process during the development or the ...
... mass ac- cording to the conditions under which it cooled and solidified . The origin both of hornblende and of pyroxene may be of various kinds . The possibility of their formation by wet process during the development or the ...
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Términos y frases comunes
aggregates Alps amygdaloidal aphanite appear argillaceous augite basalt beds bitumen brown Browncoal calcareous calcspar carbonate character chemical chlorite clay clay-slate Cleavage coal colour Colourless columnar compact composition compound conchoidal to uneven consists contains Crown 8vo crystalline schists crystals decomposed deposits diabase diorite dolerite dolomite earth Edition felsitic felspar fibrous fine-grained foliated formation fossils Fracture conchoidal frequently fuses garnet geodes geol geological Germ gneiss grains granite granular grav greenstones grey gypsum hornblende igneous rocks imbedded iron Jahrb labradorite lavas leucite lime limestone Lustre vitreous magnesia magnetic iron-ore marl mass massive matrass matrix melaphyre metamorphic mica mica-schist mineral muriatic acid occurs oligoclase opaque origin orthoclase oxide plutonic porphyritic pyrites pyroxene quartz quartz-porphyry resinous rock-salt sandstone Saxony schists sedimentary rocks serpentine shale silica slaty soluble sometimes strata sulphuric surface syenite texture trachyte transition translucent transmutation Transparent tufa usually varieties veins vesicular cavities volcanic Woodcuts
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