Quart. Journ. Geol. Soc. Vol. LXIII, Pl. XXXI. 



CONTOUR-MAP OF A PORTION OF THE CHESHIRE PLAIN AND THE SURROUNDING DISTRICT, SHOWING ALSO THE GORGE AT Horizontal Scale- 



IRONBRIDGE, AND THE GREAT ACCUMULATION OF ERRATIC BOULDERS NEAR WOLVERHAMPTON. 6Miles=i inch. 



The Irish Sea boulders are shewn by dots (•)— The Arenig boulders by rings (o) 



