Gf.oi.. Mag. 1901. 



Dec. IV, Vol. \III, I'l. II. 



Fig. I. — The Orgues de Boit, left bank of the Dordugne. 





■, ir»»- 



^^. 



Fig. 2. — rroiiioiUoiy of Basalt, Carlal. 



GEOLOGICAL VIEWS IN CENTRAL FRANCE. 



