4 Dr. Mac Culloch's Account of Guernsey^ 



the Banc de la Chole, extending in a WSW direction about the same 

 length, and having only two fathoms water on it at low tides. 



On the other side of Alderney to the north-west, is the passage of 

 the Singe, which, although narrow, contains water for ships of great 

 burthen. It is formed by the shores of Alderney and the little 

 island Burhou, and like the other passage, is subject to a short and 

 turbulent sea. 



The Island of Alderney shelves to the NE, but it is also intersected 

 by deep vallies. Its length is about three miles and a half, and its 

 greatest breadth one and a half. 



The whole of the southern and western part, from La Pendante 

 to La Clanque, is bounded by cliffs from one hundred to two hun- 

 dred feet in height, presenting various picturesque and striking 

 scenes. The northern and eastern sides consist of low cliffs, alter- 

 nating with small bays and flat shores. 



This part of the island is formed of a reddish grit, and the western 

 side of porphyry ; in which respects Alderney differs from the others 

 of the group ; which do not contain either of those rocks, at least, in 

 large masses. 



The boundary of this grit to the south-west, may be determined 

 by a line drawn from I'Etat to Braie, or nearly. It is an aggregate 

 formed from a detritus of granite, regularly vaiying in its texture and 

 colour. At the NE part of the island it is a red coarse-grained grit ; 

 but it becomes gradually whiter, and of a finer texture, towards the 

 west, till it ceases ; resembling there, the finest sandstone. It is 

 stratified through its whole extent, in parallel and equal strata, of 

 about a foot in thickness. These strata are straight and continuous 

 wherever I have observed them, and are almost every where inclined 

 in an angle of 45% dipping towards the east. Here and there, are 

 some strata of a more horizontal tendency. Their equality and the 



