Transactions of the Cambridge Philosophical SocietyUniversity Press, 1822 |
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الصفحة 369
... inter mixed with an impure chlorite schist ( 30-32 . ) . Near Cadnant the scales appear to be intermediate between mica and chlorite , and coat over the whole surface of cleavage ( 33. ) . Other varieties afford an impure mixture ...
... inter mixed with an impure chlorite schist ( 30-32 . ) . Near Cadnant the scales appear to be intermediate between mica and chlorite , and coat over the whole surface of cleavage ( 33. ) . Other varieties afford an impure mixture ...
الصفحة 372
... intermixes with crystalline limestone , dolomite , C. 3. serpentine , and jasper . The largest tract of this description ... intermixed with schistose materials . At its termination in Red - wharf bay , it forms a low but per- fectly ...
... intermixes with crystalline limestone , dolomite , C. 3. serpentine , and jasper . The largest tract of this description ... intermixed with schistose materials . At its termination in Red - wharf bay , it forms a low but per- fectly ...
الصفحة 373
... inter- mixed with decomposing argillaceous materials . When passing close to this , it appears to form a high projecting point of the cliff , but viewed from the river , it is seen in reality to be situate in the bottom of a gap formed ...
... inter- mixed with decomposing argillaceous materials . When passing close to this , it appears to form a high projecting point of the cliff , but viewed from the river , it is seen in reality to be situate in the bottom of a gap formed ...
الصفحة 377
... intermixed with slaty and chloritic serpentine irregularly laminated , with carbonate of lime ( 170. ) . Other vari- eties approximate to chloritic slate ( 164-169 . ) . A structure half fibrous half slaty is a common character ( 171 ...
... intermixed with slaty and chloritic serpentine irregularly laminated , with carbonate of lime ( 170. ) . Other vari- eties approximate to chloritic slate ( 164-169 . ) . A structure half fibrous half slaty is a common character ( 171 ...
الصفحة 378
... intermixed with the greywacké , in a manner which decidedly places it in the same formation . Whether this class of rocks originally succeeded the former in an uninterrupted order , or whether they were separated by a marked geological ...
... intermixed with the greywacké , in a manner which decidedly places it in the same formation . Whether this class of rocks originally succeeded the former in an uninterrupted order , or whether they were separated by a marked geological ...
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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