Rough Diagram of the Spiennes Beds. 0/. A. Briart, etc., "Rapport.' 



A Brick eartli. 



B Sandy loam " ergeron." 



c Sandy beds. 



D Deposit of angular and subangular flints. 



E Chalk. 



a, a, a, " PreMstoric " pits. 



Fig. 3.-1. 



Fig. 1.-^ 



Fig. 2.-1 



