Transactions of the Cambridge Philosophical SocietyUniversity Press, 1822 |
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الصفحة 89
... Granite and the rocks associated with it . § . 4 . Junction of the Killas and Granite , Granite . Veins , & c . , § . 5 . Elvan Courses , & c . . § . 6 . Killas . § . 7. Formations subordinate to the Killas . § . 1. Red Sandstone ...
... Granite and the rocks associated with it . § . 4 . Junction of the Killas and Granite , Granite . Veins , & c . , § . 5 . Elvan Courses , & c . . § . 6 . Killas . § . 7. Formations subordinate to the Killas . § . 1. Red Sandstone ...
الصفحة 95
... granite . The ridge to the south - east of Camelford , the extended moors to the north of St. Austell , and the granite tors near Redruth , are examples of the truth of this assertion . A few miles from the last - mentioned place the ...
... granite . The ridge to the south - east of Camelford , the extended moors to the north of St. Austell , and the granite tors near Redruth , are examples of the truth of this assertion . A few miles from the last - mentioned place the ...
الصفحة 96
... granite is the fundamental rock of the whole region , cannot admit of doubt . We are not left to form this opinion from analogies deduced from the relative situation of similar rocks in other countries . In passing from the slate to the ...
... granite is the fundamental rock of the whole region , cannot admit of doubt . We are not left to form this opinion from analogies deduced from the relative situation of similar rocks in other countries . In passing from the slate to the ...
الصفحة 97
... granite rocks predominate , are of a wild and dreary aspect . They are thinly covered with vegetation , and that often of the very worst quality ; and in some instances nearly half the surface is occupied by granite bowlders , the ...
... granite rocks predominate , are of a wild and dreary aspect . They are thinly covered with vegetation , and that often of the very worst quality ; and in some instances nearly half the surface is occupied by granite bowlders , the ...
الصفحة 98
... granite , which lie scattered about the moors , well deserving of his examination . The extended line of cliffs , almost always pre- cipitous , often broken into bold headlands and exhibiting in their forms the peculiar characters of ...
... granite , which lie scattered about the moors , well deserving of his examination . The extended line of cliffs , almost always pre- cipitous , often broken into bold headlands and exhibiting in their forms the peculiar characters 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