Annual Report of the Board of Regents of the Smithsonian InstitutionThe Institution, 1884 |
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Сторінка 327
... rocks . The crystalline rocks of the Taunus were regarded by Dumont as altered Devonian , a view also defended by Lossen , but Gosselet and Koch have shown on stratigraphical grounds that they must be older , and are , in part at least ...
... rocks . The crystalline rocks of the Taunus were regarded by Dumont as altered Devonian , a view also defended by Lossen , but Gosselet and Koch have shown on stratigraphical grounds that they must be older , and are , in part at least ...
Сторінка 330
... rocks , both in Cornwall and Anglesea , together with those of the Alps . W. O. Crosby has rendered a service to comparative geognosy by resuming the facts known with regard to the Eozoic rocks of eastern South America , where they ...
... rocks , both in Cornwall and Anglesea , together with those of the Alps . W. O. Crosby has rendered a service to comparative geognosy by resuming the facts known with regard to the Eozoic rocks of eastern South America , where they ...
Сторінка 341
... ROCKS . Serpentine was , by the older geologists , regarded as intrusive , and by many supposed to be derived from various eruptive rocks by a proc- ess of metasomatosis , while others have supposed it to be formed , as is doubtless ...
... ROCKS . Serpentine was , by the older geologists , regarded as intrusive , and by many supposed to be derived from various eruptive rocks by a proc- ess of metasomatosis , while others have supposed it to be formed , as is doubtless ...
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