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A gravity survey of the Bovey Tracy basin, Devon

Published online by Cambridge University Press:  01 May 2009

M. J. R. Fasham
Affiliation:
National Institue of Oceanography, Wormley, Godalming, Surrey

Summary

A detailed gravity survey, carried out to determine the thickness of the Bovey Tracey beds, is described. After removal of the regional gradient a residual gravity anomaly of – 15 mgal can be attributed to the Bovey beds. This has been interpreted assuming that the clay density increases with depth and a maximum Bovey bed thickness of 1245 m is predicted. The western contact of the basin is shown to be faulted with dips of up to 63° and is possibly an extension of the Lustleigh–Sticklepath fault system.

Type
Articles
Copyright
Copyright © Cambridge University Press 1971

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References

Best, R. & Fookes, P. G. 1969. Preliminary results of geotechnical studies on the Bovey and Petrockstow basin sediments, Devon. Proc. geol. Soc. Lond. No. 1654, 70–2.Google Scholar
Blyth, F. G. H. 1957. The Lustleigh fault in north-east Dartmoor. Geol. Mag. 94 (4), 291–6.CrossRefGoogle Scholar
Bott, M. H. P., Day, A. A. & Masson-Smith, D. 1958. The geological interpretation of gravity and magnetic surveys in Devon and Cornwall. Phil. Trans. R. Soc. A, No. 992, 251, 161–91.Google Scholar
Cooke, A. H. 1952. The gravitational attraction of a deposit of clay. Monthly notices of Roy. astron. Soc. (Geophysical supplement), 6 (5), 243–7.Google Scholar
Dearman, W. R. 1963. Wrench faulting in Cornwall and south Devon. Proc. Geol. Ass. 74, Pt. 3, 265387.CrossRefGoogle Scholar
Durbin, J. & Watson, G. S. 1951. Testing for serial correlation in least squares regression. 1. Biometrika 37, 409–27.Google Scholar
Edwards, R. A. 1969. Preliminary results of the mapping of the Bovey basin. Extract Proc. Ussher Soc. 2, Pt. 2, p. 85.Google Scholar
Fenning, P. J. & Freshney, E. C. 1968. Preliminary results of a bore-hole at Petrockstow, North Devon. Geol. Mag. 105 (2), 188–90.CrossRefGoogle Scholar
Forsyth, G. E. 1957. Generation and use of orthogonal polynomials for data fitting with a digital computer. J. Soc. Industrial and Applied Mathematics 5, 7488.CrossRefGoogle Scholar
Freshney, E. C. & Fenning, P. J. 1967. The Petrockstow basin. Proc. Ussher Soc. 1, 278–80.Google Scholar
Hammer, S. 1939. Terrain corrections for gravity stations. Geophysics 4, (3), 184.CrossRefGoogle Scholar
Reid, Clement. 1913, in Ussher, W. A. E. and others; The Geology of the country around Newton Abbot. Mem. geol. Surv. U.K. (Sheet 339).Google Scholar
Talwani, M. & Ewing, M. 1960. Rapid computation of gravitational attraction of three dimensional bodies of arbitrary shape. Geophysics, 25, 203225.CrossRefGoogle Scholar