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Figure 4. Part of William Smith’s 1819 Section of the Strata across Surrey and Sussex shown with part of his 1815 map, which has been draped on an SRTM GSA TODAY | www.geosociety.org/gsatoday
elevation model. Also shown is a modern composite seismic section (modified from Butler and Jamieson, 2013). Green—Chalk; blue-gray—Greensand and
Gault; pink-brown—Purbeck-Portland; blue—older Jurassic; orange-brown—Triassic. The locations of the seismic section (A–A´) and Smith’s section (B–B´) are
shown on Smith’s county geological maps of Kent, Sussex, and Surrey.

ACKNOWLEDGMENTS REFERENCES CITED

The Smith GIS project has been generously funded by the UK Onshore Butler, M., and Jamieson, R., 2013, Preliminary interpretation of six regional
Geophysical Library (UKOGL) and is available as a free-to-all educational profiles across onshore basins of England: UK Onshore Geophysical
resource at www.strata-smith.com. The author is extremely grateful to Hugh Library, http://maps.lynxinfo.co.uk/docs/images/interpretations/.
Torrens, Dave Williams, Tom Sharpe, John Henry, and Malcolm Butler for
materials and content included in this paper. Extracts from the William Cary, J., 1796, Cary’s Reduction of his large map of England and Wales with
Smith A map, county maps (Oxfordshire and Berkshire), and the William part of Scotland comprehending the whole of the Turnpike Roads with
Smith P map are published by kind permission of the Geological Society of the great rivers and the course of the navigable canals: J. Cary, Engraver
London and the Manuscripts and Special Collections, the University of and Map-seller.
Nottingham.
Eyles, V.A., and Eyles, J.M., 1938, On the different issues of the first geological
map of England and Wales: Annals of Science, v. 3, p. 190–212.

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