178 



EARLY MAN IN BRITAIN. 



[CHAP. vn. 



The Three Pleistocene Strata. 



The floor was covered with a dark layer of earth, 

 some five or six inches in thickness, containing fragments 

 of Eoman and mediaeval pottery, and other remains of 





FIG. 41. Strata in Robin Hood Cave. 

 + Stalactite uniting roof to breccia. 



a. Stalagmitic breccia with bones and implements to 36 inches. 



b. Cave-earth with bones and implements . . 21 to 52 ,, 



c. Red clayey sand . . . . . 24 to 48 ,, 



d. Light-coloured sand with limestone blocks, about 24 ,, 



Historic age. Below this (Fig. 4 1, a), on the left-hand side, 

 was a layer of breccia three feet thick, and sufficiently 

 hard to be blasted only with extreme difficulty. In other 

 parts of the cave it diminished in thickness, and passed 

 into thin stalagmite. It will be observed in the section 

 that it stands in an inverse ratio in regard of thickness 

 to the cave-earth below, b, containing bones, which was 



