Transactions of the Cambridge Philosophical SocietyUniversity Press, 1822 |
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الصفحة 377
... pyroxene form also a common ingredient ( 137-139 . ) ; but they are so intimately associated with the mass that they can not readily be detected , except upon a weathered surface , over which they are scattered in projecting points ...
... pyroxene form also a common ingredient ( 137-139 . ) ; but they are so intimately associated with the mass that they can not readily be detected , except upon a weathered surface , over which they are scattered in projecting points ...
الصفحة 402
... of discovering a metallic ore . The substance of this dyke is " indubitable basalt , com- posed of felspar and pyroxene . " Prof. Cordier . The effect of decomposition probably does not extend to any 402 Mr. HENSLOW on the.
... of discovering a metallic ore . The substance of this dyke is " indubitable basalt , com- posed of felspar and pyroxene . " Prof. Cordier . The effect of decomposition probably does not extend to any 402 Mr. HENSLOW on the.
الصفحة 403
... pyroxene variable . Sometimes these are nearly equal ( 483. ) , but in general the latter predominates considerably ( 484-486 . ) , and the rock is of a dark colour . Sometimes the basalt is very compact ( 486. ) , and does not exhibit ...
... pyroxene variable . Sometimes these are nearly equal ( 483. ) , but in general the latter predominates considerably ( 484-486 . ) , and the rock is of a dark colour . Sometimes the basalt is very compact ( 486. ) , and does not exhibit ...
الصفحة 411
... pyroxene " . Prof. Cordier . The main body approaches to the same earthy state as the dyke at Plas - Newydd , and through it are dispersed patches of a more compact nature ( 524. ) . This structure is common to all the dykes of a ...
... pyroxene " . Prof. Cordier . The main body approaches to the same earthy state as the dyke at Plas - Newydd , and through it are dispersed patches of a more compact nature ( 524. ) . This structure is common to all the dykes of a ...
الصفحة 412
... compactness as the generality of those which are found among the schist . It is here styled by Professor Cordier , " a true dolerite , having the ingredients , - pyroxene , fer - titané , and felspar , well 412 Mr. HENSLOW on the.
... compactness as the generality of those which are found among the schist . It is here styled by Professor Cordier , " a true dolerite , having the ingredients , - pyroxene , fer - titané , and felspar , well 412 Mr. HENSLOW on the.
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ABCD acid angle Apophyllite appearance axis ball beds carbonate of lime centre character chlorite schist clay slate cliffs coast colour compact composed considerable Cornwall Cove crystalline crystals cube cylinder decomposing decomposition described deviation direction distance district dyke earthy East equation examination exhibited Fellow felspar fissures formation fracture fragments function Galvanic gazometer granite granite veins granular green green-stone greywacké Helford river horizontal hornblende hydrogen inches instance intermixed irregular killas laminæ limestone Llanbabo Llaneilian Llanerchymedd Llanfaelog Llangefni Llanrhyddlad magnetic mass mica mineral muriate Nare point nature nearly needle North observed occur old red sandstone parallel particles passing perpendicular phenomena piston plane plate polarization porphyritic portion present pyroxene quartz quartz rock resembling Rhoscolyn schistose schorl serpentine side slaty South specimens steatite strata structure substance surface texture trace Trin ureters variety vertical whole wire