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IX.—An Exposure of Middle and Newer Pleistocene Boulder Clay in Derby

Published online by Cambridge University Press:  01 May 2009

R. M. Deeley
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Extract

Some very interesting deposits of Pleistocene age have lately been exposed on the Burton Road, Derby. The road rises on the north side of Mill Hill, and near the top, at the height of 260 feet, cuts into a mass of Boulder-clay, which is, or was, well shown in the cuttings for the new roads leading into Byron Street. Another outlier of the same clay is exposed in Littleover Lane to the southwest. The main mass of the deposit cut into on the Burton Road is a red morainic clay with boulders; apparently a subaerial moraine subsequently modified by the passage over it of land ice. Unlike the tough, silty, red and blue aqueous Boulder Clays so plentifully spread over the Midland counties, it shows little or no signs of aqueous action. Sometimes it has a banded or streaked appearance, but this seems to be due rather to a crushing or pressing-out action than to original conditions of deposition.

Type
Original Articles
Information
Geological Magazine , Volume 6 , Issue 5 , May 1889 , pp. 224 - 226
Copyright
Copyright © Cambridge University Press 1889

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References

page 225 note 1 Q. J. G. S. Nov. 1886

page 225 note 2 That Mr. A. J. Jukes-Browne has misunderstood my argument concerning the Newer Pleistocene Boulder Clays of Lincolnshire is evident from the following passage in his letter, which I quote. Referring to my short paper in the Geol. Magazine for October, 1888, he says, “ He suggests, however, that some of the clays classed by me as Newer Glacial may really be older than the Chalky Boulder Clay, and he apparently finds great difficulty in accepting the occurrence of such Newer Glacial beds at elevations approaching 400 feet.” My greatest difficulty, distinctly stated, was the supposed “ marine aspect of the high level, brown. Boulder Clays.” All Boulder Clays are certainly not marine, frequently not even aqueous.