ISLE OF MAN. -GEOLOGY. SANDSTONE, 551 



on the shore of perhaps 300 or 400 feet in breadth, and 

 scarcely a greater number of yards in length. Its breadth 

 is greatest towards the south, where its junction with the 

 schist is to be seen ; the line occupied by the limestone, 

 and that of the sandy bank which forms the shore, ex- 

 cluding it at length by their approximation. * The thick- 

 ness of the collective beds is also inconsiderable, and might 

 be computed, were it necessary, by a measurement of the 

 exposed edges of the strata. The dip is to the north, at 

 an angle of about fifteen degrees, being nearly in a reverse 

 direction to that of the stratified rocks which lie above 

 it at Castletown; whence it would appear that the 

 strata are here disposed in a sort of concave or basin-like 

 form. 



The junction of this conglomerate with the schist may 

 be traced in the high banks which form the shore, where 

 it is indicated in the map. If the schist is here disposed 

 in beds, and not merely in laminae, at the high angle of 

 eighty degrees, at which it appears to lie, the position of 

 the conglomerate is uncoiiformable to it ; the dip of the 

 schist being also here to the south, as that of the con- 

 glomerate is to the north, although neither of them are 

 constant in this respect. The schist in this place is an 

 ordinary fine cl^iy slate, of a foliated texture. 



The conglomerate is generally very coarse and loosely 

 aggregated, containing larger and smaller fragments of 

 quartz and schist cemented by clay and sand : thinner 

 strata of a sandy clay also occur in it. In colour, it is 

 either red or grey, and in some places is further mixed 

 with calcareous matter and with fragments of lime- 

 stone. 



This conglomerate is immediately followed by the beds 

 of limestone which are next to be described ; some inter- 

 ference of the two, consisting of an occasional repetition of 



* It is represented in the map as if crossing the isthmus at Langness 

 point, but it is only clearly visible on the southern shore, where the beds 

 are tairly exposed 1 



