306 Mr. N. Wood on the Geology of Northumberland, 8(c. 



when they gradually assume a steady and moderate rise to the north ; — 

 with trifling undulations they continue nearly flat to Hartley, where 

 another Basaltic Dyke cuts through the beds. The Coal in the cliffs is 

 charred, but the passage of the Basalt through the beds is not distinctly 

 exposed, partly by the disintegration of the strata, and partly from its 

 apparent connection with a Slip Dyke. 



From Seaton Sluice, a sandy beach occurs, until we cross the Blyth, on 

 the north side of which a few beds of the Coal Sandstones appear, rising 

 towards the sea at an angle of 5°. The general position of the strata 

 between these two places is, however, nearly flat, as the same beds of 

 Coal are worked at Hartley and Cowpen Collieries. 



The coast from Blyth for a considerable distance north consists of 

 sandy dunes, until opposite North Seaton, where we find a very thick 

 bed of White Sandstone, with two layers of Coal and Shale, the upper 

 part of the Sandstone being quarried for grindstones. Beyond this 

 is Newbiggen Bay, on the north side of which, a reef of gritty Sandstone 

 rocks stretches into the sea, rising north about 1 in 6. 



To the north of Newbiggen for some distance, the coast is very low 

 with occasional rocks of Sandstone and Shale, of the Coal Measures, dip- 

 ping gently north, with appearances of Slip Dykes in several places. At 

 Hadstone a reef of Red Sandstone occurs, coarse and gritty, composed 

 of Quartz coloured by a ferruginous cement ; line of direction S. 60° E., 

 dip 1 in 12 north. Upon this lie beds of Shale and finer-grained Sand- 

 stones. Passing over a sandy beach, we find at Hawksley coarse Sand- 

 stone rocks of the Coal Measures, rising north 1 in 12, which extend 

 with little interruption to the river Coquet, where they terminate. The 

 Island of Coquet, opposite here, seems a continuation of the same beds 

 of Sandstone. 



The coast north of the Coquet for about one mile and a half is en- 

 tirely sand, with high bent hills, when a bed of very hard and coarse 

 Sandstone occurs, rising north about 1 in 15, underneath which are in- 

 dications of thin layers of Coal and Bituminous Shale. A little way 

 further north, the beds rise more rapidly. Between this and the har- 

 bour of Alemouth is a flat sandy beach, which extends beyond the 



