EATE OF EROSION OF THE SEA-COASTS OF ENGLAND AND WALES. 859 



10. The Coast of Pembrokeshire— North-Western Part. 



By Capt. Thomas Gbiffiths and H. Whiteside Williams, F.G.S. 



(Communicated by Henry Hicks, M.D., F.E.S., F.G.S.) ' 



This report refers to that portion of the coast of Pembrokeshire situate between 

 Aberbach, on the northern coast, and Ricket's Head, in St. Bride's Bay. 



The clifFs in this coast line vary in height from 50 to 250 feet, with an average 

 height of about 100 feet. [The rocks forming the coast-line belong to the Archsean, 

 Cambrian, Ordovician, and Carboniferous series, with intrusive and contemporaneous 

 volcanic rocks. — H. H.] 



Map of the Coast of Pembeokeshiee. 



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ADLR-BACH S-^ 



ABEB-ERDD 



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 whitesand'^ 



BAY 



RAMSEY 19 



HA VSRFCRa i/V£ST^ 



Recent sea-beaches are plentiful all along the coast, and on the upper portions 

 of the numerous small bays and creeks there will, generally, be found a ridge of 

 accumulated pebbles protecting the rocks and the alluvial deposits where sucli occur. 



The pebbly bar at Newgale extends a distance of something over a mile ; that at 



1 The papers forwarded to the Committee consisted of a general Report; numerous 

 memoranda and sketch-maps of local details ; and answers to the questions upon the usual 

 form (see p. 847). These have all been incorporated by me into one report, as nearlv as possible 

 in the words of the authors. The additions by Dr. H. Hicks are inserted within" brackets. — 



W. TOPLEY. 



