OF WESTERN EUROPE AND THE MEDITERRANEAN COASTS. 
927 
as derived from an old cave floor and hearth (H) spread on the surface of the fluviatile 
beds No. 3, and caught up by the angular debris as it swept down from the heights 
above, just as in the same rubble (No. 2) there are fragments of clay and gravel 
{a, h) derived from the beds 3a, 36 beneath it. Not but that this rubble may, as 
elsewhere, have some remains proper to it, but their origin in this case appears to me 
to be clearly from the denuded beds. It is important to notice in connection with 
Fig. 12. —Section of the “ Trou du Frontal" (Dupont).* 
2. Yellow clay and liglit grey earth, with angular fragments of limestone, containing at S, Human 
sepulchral bones, and at H, debris of repasts and industrial works of (palaeolithic) Man ; D, flagstone 
shutting the sepulture; E, hearth; a, b, fragments of clays from Bed 3, eroded at the time of de¬ 
position of No. 2 (Argile d hlocaux ; Reindeer age). 
3. Stratified argilo-arenaceous deposits (fluviatile) ; 3a, reddish yellow clay; 3h, seam' 
of gravel; 3c, grey clay alternating with yellow sands 
4. Rolled pebbles derived from the Ardennes (fluviatile) 
6. Greenish quartzose sands, with traces of peat 
6. Red clay in veins. E, rock. 
(Bed No. 2 corresponds with our Rubble-dtift, and Nos. 3 and 4 with our fluviatile valley-drifts.) 
^Mammoth age. 
I 
this section these clay fragments, a and h, for it shows, as I have had occasion to 
note everywhere with the Rubble-drift, that the movement has been from above 
downwards, and that it has been of such short duration that substances so soft as 
these should have been jDreserved intact in the body of the rubble. Had the agency 
been running water, or subaerial, these fragments must have been disintegrated and 
lost in the mass. Nor would ice have answered the purpose. The case is in some 
degree analogous to the Gower Cliff sections, where the Rubble-drift has masked the 
* ‘ Coug. Inf. d’Anfbrop. et d’Archeol. Prehis. a Bruxelles,’ 1872, Plate 31. 
