ALSTON MOOR TO BOTANY AND TANHILL: AN ADVENTURE IN STRATIGRAPHY
| Autor: | R. G. Carruthers |
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| Rok vydání: | 1937 |
| Předmět: | |
| Zdroj: | Proceedings of the Yorkshire Geological Society. 23:236-253 |
| ISSN: | 2041-4811 0044-0604 |
| DOI: | 10.1144/pygs.23.4.236 |
| Popis: | Of late years it has become increasingly evident that a serious effort ought to be made to clear up the doubts and uncertainties attending Lower Carboniferous correlations in the North-Eastern Pennines. The Geological Survey maps, always the main source of our information, had served their purpose well, but the latest one was drafted forty-five years ago. Amongst the Yoredale rocks, no one really knew what were the external equivalents of the two Felltop Limestones of Alston Moor, and the old ‘miner’s sequence’ there needed re-examination : it had not been touched since the Survey emendations of 1883. Furthermore, a skeleton sequence in the Tyne valley wanted elaboration, and, following that, comparison with Alston Moor. As to the Millstone Grit, the Durham development of that series was not known in detail, nor had any attempt been made to compare it with the supposedly equivalent measures in North-West Yorkshire. Obviously, then, there was much to do. The re-mapping of so extensive a tract (it extends from the Swale to the Tyne) was out of the question, and in any case, long experience of these rocks in Scotland and the North of England led one to a profound distrust of the usual stratigraphical methods—the ‘running’ of some particular horizon irrespective of its associates, the direct comparison of districts much too far apart, or the specialized use of fossils. (On this latter point, I do not wish to be misunderstood. In the southern Pennines, the goniatite country par excellence, the reverse, of course, … |
| Databáze: | OpenAIRE |
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