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(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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Reference TypeJournal (article/letter/editorial)
TitleI.—A Case of Metamorphism of Chalk
JournalGeological Magazine
Year1907 (April)Series:Volume5:4
Issue4
PublisherCambridge University Press (CUP)
DOIdoi:10.1017/s001675680013167x
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Mindat Ref. ID265802Long-form Identifiermindat:1:5:265802:9
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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
Plain Text(1907) I.—A Case of Metamorphism of Chalk. Geological Magazine, S. 5 Vol. 4 (4) 145-148 doi:10.1017/s001675680013167x
In(1907, April) Geological Magazine S. 5 Vol. 4 (4) Cambridge University Press (CUP)
Abstract/NotesCases 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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