Reference Type | Journal (article/letter/editorial) |
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Title | I.—A Case of Metamorphism of Chalk |
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Journal | Geological Magazine |
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Year | 1907 (April) | Series:Volume | 5:4 |
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Issue | 4 |
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Publisher | Cambridge University Press (CUP) |
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DOI | doi:10.1017/s001675680013167x |
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| Generate Citation Formats |
Mindat Ref. ID | 265802 | Long-form Identifier | mindat:1:5:265802:9 |
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GUID | 0 |
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Full Reference | (1907) I.—A Case of Metamorphism of Chalk. Geological Magazine, S. 5 Vol. 4 (4) 145-148 doi:10.1017/s001675680013167x |
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Plain Text | (1907) I.—A Case of Metamorphism of Chalk. Geological Magazine, S. 5 Vol. 4 (4) 145-148 doi:10.1017/s001675680013167x |
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In | (1907, April) Geological Magazine S. 5 Vol. 4 (4) Cambridge University Press (CUP) |
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Abstract/Notes | Cases of metamorphosed limestones where the calcium carbonate has been converted by contact with some igneous magma into a calc-silicate rock are by no means rare, one of the best known being the conversion of the Coniston Limestone of the Lake District by the Shap Granite into a rock with various calc-silicate and other minerals such as Wollastonite, Omphacite, etc., as described by Messrs. Harker and Marr. But as far as I know, no case has been recorded where ordinary white chalk has been similarly changed. Dr. Hibsch describes a case of baculite marl containing Foraminifera which has been altered by contact with dolerite. The Foraminifera disappear and the rock becomes a granular limestone with epidote, forming a calc-silicate hornstone. This seems the nearest case to the alteration in co. Antrim I am about to describe. |
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