370 Geological Survey of the Island of Jersey. 



pared with that under Fort Regent, I have no reason to suppose 

 that it varies in its nature from that of the soil in the St. 

 Helier's Valley, and in the contiguous flats extending to near 

 Mount Orgueil. Respecting these last, I have been able to 

 procure the following sections : — 



Well at Elizabeth Castle. 

 18.6 Sandy, fine clay, (see No. 54). 

 6.0 Debris, angular. 

 4.0 Pebbles ) 

 4.0 Blue clay j contamm S the water ' 



Well at Fort Regent, 

 236 feet deep; all sienite; water 

 soon found ; but continued till 30 

 or 40 tons per day came in from 

 all crevices and corners, not from 

 any particular stratum. 

 West end of St. Heliefs — sandst. 

 7.0 Sand. 

 10 to 15 A mixture of vegetable 



earth and stones. 

 8.0 Sandy clay, No. 54. 

 4.0 Blue clay. 



8 to 12 Gravelly clay, in the lower 

 5 of this the gravel was clean, 

 water-worn, and containing an 

 indifferent water. 



Centre of St. Helier '$, 

 Mt. Le Capelain. 



8.0 Sand. 



16.0 Blue clay intermixed with 

 strata of No. 54 ; in this, at 16 

 feet below the surface, hazle 

 nut shells and a boar's tusk 

 were found. 



2.0 Turf. 



2.0 Rounded gravel, mostly sienite. 

 Water impregnated with sul- 

 phur. Rock. 



Upper end of the Valley, 

 (nearg\) 



2 feet vegetable earth. 

 12.0 Sandy clay, No. 54. 

 16.0 Angular debris, clean, and con- 

 taining abundance of water, 

 but not of the purest quality. 



Pier, on blue clay. 



All the valley waters throw down a precipitate, adhering to 

 the vessels in which boiled ; and some of them are occasionally 

 covered with a film of sulphur. By all accounts, the nature 

 of the ground in the flats, that reach from Fort Regent to Grou- 

 ville, bears a close resemblance to that which has been just 

 described ; except that water is more uncertain, and when 

 found, generally brackish ; sometimes 80 feet have been bored 

 in vain, through sandy, blue, and whitish clays; and at other 

 times water has been met with at 16 feet below the surface, as 

 near St. Clement's Church. 



Sand. 



The flat grounds on the southern and western coasts are 

 liable to the encroachments of the sand, blown over them by 



