Vol. 60.] EOCENE OUTLIER OEE THE CORXTSH COAST. 



115 



extensive deposit of angular Chalk-flints at Ludgvan. and the 

 occurrence of a mass of beach-pebbles of the same flints to the lee- 

 ward at Mullion, convince me that an Eocene outlier is preserved, 

 or lately existed, under the sea not far from St. Michael's Mount. 

 The stones from this deposit were probably thrown up by storms 

 and carried up entangled in seaweed, uutil they formed a considerable 

 part of the raised beach opposite. They were also drifted by the 



Fig. 1. — Map of South- Western Cornwall, on tlu 



scale of 6 miles to the inch. 



Above 400 Feet. 

 200-400 Feet 



m 



Below 200 Feet, f'r 



WolfRcclc 



prevalent wind right across Mount's Bay, becoming smaller and 

 more rounded, till they were reduced to the smooth bean-like pebbles 

 which we find at Gunwalloe. 



The curious distribution of the flints, which elsewhere in Corn- 

 wall seem to occur only as scattered ice-borne erratics, combines 

 with the striking contour of the bay (see fig. 1) in which the 

 angular flints occur to localize the outlier ; but there is a further 

 piece of evidence, of which the bearing was not at first seen. 



1 2 



