Seismic investigations on the Palaeozoic floor of east England

Abstract
The depth of the Palaeozoic floor under part of east England has been investigated by the refraction seismic method. Records have been taken every 200 ft. along lines 4000-8000 ft. long; such detailed shooting enables various sources of uncertainty in the results to be investigated. The interpretation of the seismic results required a more thorough knowledge of the contours of the Jurassic and Cretaceous than was available; the data from bore-holes and outcrops have therefore been collected and are presented in the form of contoured maps showing the depths of various horizons and the thicknesses of rock between them. A map of the form of the Palaeozoic floor and a discussion of its constitution are also given. The latter is based on a re-examination of the bore-hole cores and on the seismic velocities.

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