36 OSSEOUS BRECCIAS AND 



the transient nature of the event is indicated by the 

 fact that these soft clay and sand fragments are entire 

 and not broken up and lost in the detrital mass. 



The surface of this Bubble-drift left dry on the 

 retreat of the waters continued to afford, where 

 protected by overhanging rocks, shelters which were 

 frequented by later or Neolithic Man, who has there 

 left traces of his habitation in his stone implements 

 mixed with the refuse of the products of his chase. 



Osseous Breccias. Several of these accumulations 

 have been described in the valleys around Paris. One 

 very striking example occurs more inland near Semur, 

 where a hill (Mont Genay) 1,430 feet high has 

 apparently been entirely submerged, and a bank of 

 breccia, derived from the rocks which cap its summit, 

 and containing the remains of the Mammoth, Reindeer, 

 Horse, &c., with land shells, has been formed on its 

 flanks. Another large mass of ossiferous breccia was 

 met with near Mentone in a cutting of the railway, 

 where it passes under limestone cliffs, which there 

 rise to the height of 260 feet, and in which is situated 

 the celebrated cave of Baussi Roussi. Below the 

 cave and forming a steep slope extending down to 

 the shore, was a thick mass of angular debris derived 

 from the hills above, and so hard that it had to be 

 blasted with gunpowder. In this breccia at depths 

 of 30 feet or more, teeth of Cave Bear and Spotted 

 Hycena, 1 together with flints worked by Man, were 

 found. 



1 Moggridge, Brit. Assoc. Reports for 1871, p. 156. 



