Hostname: page-component-745bb68f8f-d8cs5 Total loading time: 0 Render date: 2025-01-26T18:01:11.627Z Has data issue: false hasContentIssue false
  • English
  • Français

The Lower Bunter Sandstones of North Worcestershire and East Shropshire

Published online by Cambridge University Press:  01 May 2009

F. W. Shotton
Get access Rights & Permissions [Opens in a new window]

Extract

The Composition of the Sand.

The Lower Bunter consists of sand whose average grain size is about ·2 mm. Particles below 0·05 mm. or above 1 mm. are virtually absent.

The fineness of the sand and restricted limits of size variation in the whole thickness of the deposit, and the high perfection of sorting in individual samples indicate an aeolian origin.

The False Bedding.

No true bedding exists in the Lower Bunter examined.

The false-bedding is only explicable on an aeolian origin. It is argued that it must represent cross-sections of barchan dunes advancing in a sand sea that was steadily increasing in thickness.

The frequency distribution of the values of the false-bedding dips confirms this interpretation.

The directions of different types of false-bedding indicate that transport and deposition was effected almost entirely by a prevailing east wind.

Relation of the Lower Bunter to the Mercian Highlands.

The establishment of an easterly origin for the sand indicates that the “ Mercian Highlands ” of the Birmingham district were the source of sand supply.

Arguments are adduced towards the correlation of the Barr Beacon Beds and the Lower Bunter Sandstone, the former being regarded as the thin piedmont spread of scree material fringing the desert.

Type
Original Articles
Information
Geological Magazine , Volume 74 , Issue 12 , December 1937 , pp. 534 - 553
Copyright
Copyright © Cambridge University Press 1937

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

List of Works to which Reference is made

Bagnold, R. A., 1935. “The Movement of Desert Sand,” Geogr. Journ., lxxxv, 342.CrossRefGoogle Scholar
Beadnell, H. J. H., 1910. “The Sand Dunes of the Libyan Desert,” Geogr. Journ., xxxv, 379.CrossRefGoogle Scholar
Boswell, P. G. H., 1918. British Resources of Sands and Rocks used in Glass Making, 2nd edition, London.Google Scholar
Boulton, W. S., 1933. “The Rocks between the Carboniferous and Trias in the Birmingham District,” Quart. Journ. Geol. Soc., lxxxix, 53.CrossRefGoogle Scholar
Fleet, W. F., 1927. “The Heavy Minerals of the Keele, Enville, ‘Permian,’ and Lower Triassic Rocks of the Midlands,” Proc. Geol. Assoc., xxxviii, 1.CrossRefGoogle Scholar
Holmes, A., 1921. Petrographic Methods and Calculations, London.Google Scholar
Kádár, L., 1934. “A Study of the Sand Sea in the Libyan Desert,” Geogr. Journ., lxxxiii, 470.CrossRefGoogle Scholar
McKee, E. D., 1934. “The Coconino Sandstone—Its History and Origin,” Cam. Inst. of Washington, Pub. No. 440, p. 77.Google Scholar
Sokolow, N. A., 1894. Die Dünen, Bildung, Entwickelung und innerer Bau. (Germ, trans, by A. Arzruni), Berlin.Google Scholar
Trask, P. D., 1930. “Mechanical Analyses of Sediments by Centrifuge,” Econ. Geol., xxv, 581.CrossRefGoogle Scholar
Trask, P. D., 1932. Origin and Environment of Source Sediments of Petroleum, Texas.Google Scholar
Twenhofel, W. H., 1932. Treatise on Sedimentation, 2nd edition, London.Google Scholar
Udden, J. A., 1898. “The Mechanical Composition of Wind Deposits,” Augustana Library Publication No. 1.Google Scholar
Whitehead, T. H., and others. 1928. “The Country between Wolverhampton and Oakengates,” Mem. Geol. Surv. Eng. and Wales.Google Scholar