Self portrait of Henry de la Beche from his description of an unconformity at Portishead. (courtesy of Nineteenth Century Geological Maps, http://www.geolmaps.com)
1846 De la Beche
The Geological Society Blog
Self portrait of Henry de la Beche from his description of an unconformity at Portishead. (courtesy of Nineteenth Century Geological Maps, http://www.geolmaps.com)
The Geological Society Blog 
