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Geology of the Aust-Beachley District, Gloucestershire

Published online by Cambridge University Press:  01 May 2009

W. F. Whittard
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Abstract

The folds and many of the faults in the Keuper Marls of the Aust-Beachley District are claimed to be compaction phenomena. The distribution of almost vertical sheets of alabaster in the Keuper Marls is attributed to infilling of contraction cracks. The palaeontology of the Carboniferous rocks, particularly of the seldom-visited islands of the Severn, is used to determine the structure. Several post-Triassic faults of tectonic origin have been mapped and others predicted; the age of the faulting is unknown.

Type
Articles
Information
Geological Magazine , Volume 86 , Issue 6 , December 1949 , pp. 365 - 376
Copyright
Copyright © Cambridge University Press 1949

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References

page 365 note 1 The limits of the estuary are difficult to define but the pilotage areas for the Bristol Channel and the Severn Estuary are considered navigationally to join at King Road, Avonmouth. Physiographically the argument could be made that the estuary extends from Gloucester as far as a line drawn from Morte Point to Worms Head, a distance of 117 miles as measured along the river.

page 365 note 2 Bassindale, R., 1943. Studies on the Biology of the Bristol Channel. XI. The Physical Environment and Intertidal Fauna of the Southern Shores of the Bristol Channel and Severn Estuary. Journ. Ecology, xxxi, pp. 6 and 7.Google Scholar

page 366 note 1 Report Severn Barrage Committee. H.M. Stationery Office Publication No. 63–78–1, pp. 16–19, 1933.Google Scholar

page 366 note 2 Whittard, W. F., 1948. Temporary Exposures and Borehole Records in the Bristol Area. I. Records of Boreholes sunk for the New Severn and Wye Bridges. Proc. Bristol Nat. Soc., xxvii, pp. 311–328.Google Scholar

page 366 note 3 Trans. Geol. Soc., 2nd Ser., i, p. 304 (pl. 37), 1824.Google Scholar

page 366 note 4 Proc. Cotteswold Naturalists' F.C., xxix, pp. 29–39, 1946.Google Scholar

page 367 note 1 Whittard, W. F., op. cit., p. 315.Google Scholar

page 372 note 1 Whittard, W. F., op. cit., p. 317, borehole 14.Google Scholar

page 374 note 1 Whittard, W. F., op. cit., pp. 318–321.Google Scholar