Transactions of the Cambridge Philosophical SocietyUniversity Press, 1822 |
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الصفحة 291
... passage round the coast . The Geological collection which we formed during the same part of our tour , will , it is ... Helford river , and terminated at Loe - Bar . To the north of Vol . I. Part II . PP External a line drawn between ...
... passage round the coast . The Geological collection which we formed during the same part of our tour , will , it is ... Helford river , and terminated at Loe - Bar . To the north of Vol . I. Part II . PP External a line drawn between ...
الصفحة 292
... Helford river . The view of the same region from the western shore of Mount's - Bay , is still more striking and charac- teristic . The upper surface seems so exactly horizontal , that one might almost be led to conjecture , that every ...
... Helford river . The view of the same region from the western shore of Mount's - Bay , is still more striking and charac- teristic . The upper surface seems so exactly horizontal , that one might almost be led to conjecture , that every ...
الصفحة 293
... water . The peculiar constitution of the rocks , which has favoured the excavation of these ravines , has also enabled the sea to encroach on the mean bearing of the ... Helford river . first volume of the P 2 of the Lizard District . 293.
... water . The peculiar constitution of the rocks , which has favoured the excavation of these ravines , has also enabled the sea to encroach on the mean bearing of the ... Helford river . first volume of the P 2 of the Lizard District . 293.
الصفحة 294
... Helford river , we found , ( about two miles to the south - west of Falmouth , ) several bowlders of granite , containing such an unusual quantity of mica as to exhibit a slaty texture . Such a locality as this would certainly not be ...
... Helford river , we found , ( about two miles to the south - west of Falmouth , ) several bowlders of granite , containing such an unusual quantity of mica as to exhibit a slaty texture . Such a locality as this would certainly not be ...
الصفحة 295
... Helford river . Immediately on landing , chan . not many hundred feet from that headland , we found a low cliff , chiefly composed of yellow siliceous sand , containing many frag- ments of slate , obviously derived from the detritus of ...
... Helford river . Immediately on landing , chan . not many hundred feet from that headland , we found a low cliff , chiefly composed of yellow siliceous sand , containing many frag- ments of slate , obviously derived from the detritus of ...
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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