 | Manchester Literary and Philosophical Society - 1868 - 362 pages
...was supposed would be the case by my esteemed friend Dr. Geinitz, who says in his ' Dyas ' * "he had not obtained any certain information as to the existence...appears that the absence of the hornstone porphyry (' Felsitporphyr ' proper) just in those districts of England has a bearing upon this question. It... | |
 | 1868 - 360 pages
...was supposed would be the case by my esteemed friend Dr.Geinitz, who says in his 'Dyas' * " he had not obtained any certain information as to the existence...appears that the absence of the hornstone porphyry (' Felsitporphyr ' proper) just in those districts of England has a bearing upon this question. It... | |
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he had not obtained any certain information as to the existence in England of a lower ' Rothliegende/ or in general of any lower division of the Dyas. From the observations previously made in these pages, it appears that the absence of the hornstone... 