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Some Grits and Associated Rocks in the Etruria Marls of North Staffordshire

Published online by Cambridge University Press:  01 May 2009

W. O. Williamson
W. O. Williamson
Affiliation:
Government Metallurgical Laboratory, University of the Witwatersrand, Johannesburg
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Extract

The grits and conglomerates in the Etruria Marls of North Staffordshire include types with a chamosite-rhombohedral carbonate cement containing interesting spherulitic and concentric structures. Manganese appears in this cement and in certain calcareous bands in the argillaceous fades of the Marls. The clastic fragments suggest derivation from Pre-Cambrian and Cambrian rocks. The heavy mineral suite resembles that listed by Fleet for similar horizons in the Midlands, but staurolite is recorded also.

There is no new evidence bearing on Robertson’s hypothesis that basic igneous rocks of Carboniferous age have contributed to the formation of the Etruria Marls.

Type
Articles
Information
Geological Magazine , Volume 83 , Issue 1 , February 1946 , pp. 20 - 32
Copyright
Copyright © Cambridge University Press 1946

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References

Boulton, W. S., 1916–17. The Clays of South Staffordshire and its Borders. Trans. Ceram. Soc., 16, p. 237.Google Scholar
Du Toit, A. L., 1939. The Geology of South Africa, Edinburgh.Google Scholar
Eyles, V. A., 1930. The Economic Geology of the Ayrshire Coalfields, Area III. Mem. Geol. Surv. Gt. Britain.Google Scholar
Fleet, W. F., 1925. The Chief Heavy Detrital Minerals in the Rocks of the English Midlands. Geol. Mag., 62, p. 98.CrossRefGoogle Scholar
Gibson, W., 1899. In Mem. Geol. Surv. Summary of Progress for 1898, p. 123.Google Scholar
Gibson, W., 1901. On the Character of the Upper Coal-Measures of North Staffordshire, Denbighshire, South Staffordshire, and Nottinghamshire, and their Relation to the Productive Series. Quart. Journ. Geol. Soc., 57, p. 251.CrossRefGoogle Scholar
Gibson, W., 1905. The Geology of the North Staffordshire Coalfields. Mem. Geol. Surv.Google Scholar
Gibson, W., 1925. The Geology of the Country around Stoke-upon-Trent. Mem Geol. Surv. Gt. Britain.Google Scholar
Hallimond, A. F., 1925. Iron Ores; Bedded Ores of England and Wales. Petrography and Chemistry. Geol. Surv. Special Reports on the Mineral Resources of Great Britain.Google Scholar
Hallimond, A., 1939. On the Relation of Chamosite and Daphnite to the Chlorite Group. Min. Mag., 25, p. 441.Google Scholar
Marshall, C. E., 1942. Field Relations of Certain of the Basic Igneous Rocks associated with the Carboniferous Strata of the Midland Counties. Quart. Journ. Geol. Soc., 98, p. 1.CrossRefGoogle Scholar
Mitchell, G. H., 1942. The Geology of the Warwickshire Coalfield. Geol. Surv. Wartime Pamphlet No. 25; see also Geol. Mag., 1942, 79, p. 255.Google Scholar
Morse, H. W., Warren, C. H., and Donnay, J. D. H., 1932. Artificial Spherulites and Related Aggregates. Amer. Journ. Sci., 23, p. 421.CrossRefGoogle Scholar
Morse, H. W., and Donnay, J. D. H., 1932. Spherulite Optics, Amer. Journ. Sci., p. 440.CrossRefGoogle Scholar
Morse, H. W., and Donnay, J. D. H., 1936. Optics and Structure of Three-dimensional Spherulites. Amer. Min., 21, p. 391.Google Scholar
Pocock, R. W., 1931. The Age of the Midland Basalts. Quart. Journ. Geol. Soc., 87, p. 1.CrossRefGoogle Scholar
Pulfrey, W., 1933. The Iron-ore Oolites and Pisolites of North Wales. Quart. Journ. Geol. Soc., 89, p. 401.CrossRefGoogle Scholar
Read, H. H., 1931. The Geology of Central Sutherland. Mem. Geol. Surv.Google Scholar
Robertson, T., 1931. The Origin of the Etruria Marl. Quart. Journ. Geol. Soc., 87, p. 13.CrossRefGoogle Scholar
Scott, A., 1932–3. Review in Trans. N. Staffs Field Club, 67, p. 88.Google Scholar
Shotton, F. W., 1929. The Geology of the Country around Kenilworth (Warwickshire). Quart. Journ. Geol. Soc., 85, p. 167.CrossRefGoogle Scholar
Spencer, E., 1925. On some occurrences of Spherulitic Siderite and other Carbonates in Sediments. Quart. Journ. Geol. Soc., 81, p. 667.CrossRefGoogle Scholar
Thomas, H. H., 1909. A Contribution to the Petrography of the New Red Sandstone in the West of England. Quart. Journ. Geol. Soc., 65, p. 229.CrossRefGoogle Scholar
Williamson, W. O., 1935. The Composite Gneiss and Contaminated Grano-diorite of Glen Shee, Perthshire. Quart. Journ. Geol. Soc., 91, p. 382.CrossRefGoogle Scholar
Wills, L. J., 1935. An Outline of the Palaeogeography of the Birmingham Country. Proc. Geol. Assoc., 46, p. 211.CrossRefGoogle Scholar
Wilson, G. V., 1930. The Geology of North Ayrshire (Explanation of the One-inch Sheet 22). Mem. Geol. Surv. Gt. Britain.Google Scholar
Woodland, A. W., 1938. Petrological Studies in the Harlech Grit Series of Merionethshire, II: The Petrography and Petrology of some of the Grits. Geol. Mag., 75, p. 440.CrossRefGoogle Scholar
Woodland, A. W., 1939. The Petrography and Petrology of the Lower Cambrian Manganese Ore of West Merionethshire. Quart. Journ. Geol. Soc., 95, p. 1.CrossRefGoogle Scholar