or WESTERN EUROPE AND THE MEDITERRANEAN COASTS. 
917 
1. “Head” of angular fragments and small blocks of diorite and syenite, passing down'| 
into debris of decomposed syenite or gi’anite (cbiefly at its base), mixed with more I 
or less loam or brick-earth, and containing small flat calcareous concretions (race) f ® ® 
and a few rolled pebbles derived from the beach. J 
2. Raised beach, formed of pebbles of diorite and red granite or syenite. There were] 
no shells to be seen. Remains only in places. r6 to 12 inches. 
3- Diorite.. to 3 feet. 
The syenite and diorite fragments in the rubble arc derived from the hills of the 
adjacent coast, while the brick-earth which caps those hills forms the chief portion of 
the rubble matrix. Notwithstanding the slight difference of level and the very small 
gradient of the slope from the inland hills to La Motte, a considerable spread of 
rubble-drift has been propelled thus far out (fig. 9), which, I conceive, could only have 
been effected by a strong effiuent current, passing from the mainland sea-ward during 
upheaval of the land. The hills are so low and distant that no snow-slide could ^ 
possibly have effected this transport. 
s 
La. Motte islet. 
, 22 ’ 
Fig. 9 .—Section from La Motte to Mont JJhe. 
MoTtt Vbe 
a. Rubble-drift, composed of grauitic and diorite debris in a brick-earth or Loess, covered by a sandy 
earth and soil. 
c. Raised beach—only portions of this remain. 
The phenomena, however, are readily explicable on the assumption tliat, as with the 
head at Brighton and Sangatte, the driving force was that of a superincumbent body 
of water, flowing outwards. As at Sangatte, the forcible impact of the head on the 
beach has led to the incorporation of fragments of the beach in the head. 
Alderney. —I did not visit this island, but an unpublished section, taken many years 
Eig. 10 .—Section on the Coast of Alderney (De La Condamine). 
a'. Rubble-drift or Head ; c, Raised Beach. No description is attached to Mr. De La Condamine’s sketch, 
but this drawing, compared with his other drawings, leaves me in no doubt of its meaning. The 
rubble seems partly consolidated. 
