Transactions of the Cambridge Philosophical SocietyUniversity Press, 1822 |
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الصفحة 100
... irregular masses presenting the above - mentioned characters , we found apatite , crystallized in hexagonal prisms of a bluish green colour , nearly resembling the same mineral at St. Michael's Mount ; and , what I consider more unusual ...
... irregular masses presenting the above - mentioned characters , we found apatite , crystallized in hexagonal prisms of a bluish green colour , nearly resembling the same mineral at St. Michael's Mount ; and , what I consider more unusual ...
الصفحة 102
... irregular heap of rounded fragments . Some part of the cliffs between Land's End and Cape Cornwall afford striking examples of this second stage of decomposition . From the upper part of the cliff being more exposed to atmospheric ...
... irregular heap of rounded fragments . Some part of the cliffs between Land's End and Cape Cornwall afford striking examples of this second stage of decomposition . From the upper part of the cliff being more exposed to atmospheric ...
الصفحة 107
... irregular masses which were once imbedded in the granite . This opinion is confirmed by the appearance of the western cliffs , which are irregularly traversed by veins of schorl rock varying from the fraction of an inch to many feet in ...
... irregular masses which were once imbedded in the granite . This opinion is confirmed by the appearance of the western cliffs , which are irregularly traversed by veins of schorl rock varying from the fraction of an inch to many feet in ...
الصفحة 109
... irregular concretions , or imbedded masses . Accordingly , those mineral aggregates only , are described , which have appeared in some of the above - mentioned forms , and are supposed to be coeval with the granite . They might perhaps ...
... irregular concretions , or imbedded masses . Accordingly , those mineral aggregates only , are described , which have appeared in some of the above - mentioned forms , and are supposed to be coeval with the granite . They might perhaps ...
الصفحة 132
... irregular superficies which is , on the whole , nearly perpendicular to the horizon . In this respect , therefore , the junc- tion of the two formations presents an analogy to the phenomena we have before insisted on . * See the ...
... irregular superficies which is , on the whole , nearly perpendicular to the horizon . In this respect , therefore , the junc- tion of the two formations presents an analogy to the phenomena we have before insisted on . * See 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