MEETINGS. 183 



8. — Forest Road. 

 Along the Forest Koad an extensive deposit of yellow 

 clay has been noted. A well recently sunk on Mr. Heaume's 

 property at Les Pieces has exposed a section in which 13 feet 

 of compact clay is visible. Some appearances of irregular 

 stratification (not necessarily indicating aqueous deposition) 

 are here exhibited. 



9. — East Coast (a) St. Martin's Point. 



The cliff deposits at St. Martin's Point have been care- 

 fully examined. The cliff is a composite one, consisting of 

 clay and rubble in distinct bands in the following order: — 

 (a) A rubble band of some feet in depth resting on a 

 thin layer of raised beach, (b) Above this rubble is the chief 

 deposit of clay. It is yellow in colour, plastic, and very 

 impermeable to water, (c) A badly defined, but nevertheless, 

 distinct rubble band, followed by (d) a lesser clay deposit in 

 which rolled pebbles have been found (see fol. Trans. 18). 

 The layer ( b) is, in the neighbourhood of the battery at St. 

 Martin's point, found to contain peculiar layers of tufa. The 

 formation of tufa is fairly extensive, being found along the 

 coast from 50 yards south of the battery to some 50 to 

 60 yards north of it. This tufa consists of clay permeated 

 by water containing lime and silica in solution, and though 

 soft where unexposed to the air, is hard on the face 

 of the cliff, from which it projects and forms nodules 

 arranged in layers which may be traced by the eye, this 

 arrangement being doubtless due to the impermeability of the 

 underlying bands of clay. As the mass below the tufa is 

 undermined by the action of the sea, the projecting tufa bands 

 drop to the beach. These nodules may be found abundantly 

 at the foot of the cliffs, having dropped from the aforesaid 

 layers. This formation is found between 8 and 30 feet above 

 the base of the cliff, at intervals. Shells have been found in 

 the tufa, but their nature has not yet been ascertained. 



(b) Bec-du-Nez. (c) Divette. (d) Fermain. 



The same formations as above described have been traced 

 along these coasts, but the tufa is nowhere so well exhibited 

 nor so plentiful as at St. Martin's Point. 



RAISED BEACHES. 



The details of the portions of the raised beaches noted 

 during the year are here given in the order in which they 

 were viewed : — 



