Mr. WiTBjM on the Red Sandstones of Ber*wicJcshire. IJS 



mile south of Berwick, a thick bed of Shale is seen dipping at an angle 

 of 43° in the direction of S. 84 E. A few yards beyond, a Limestone 

 crops out, overlaid by a thick dark Shale 9 feet thick. This bed is 

 overlaid by a strong bed of Red Sandstone forming the cliffs extending 

 towards the Tweed. Here a remarkable cliff is formed by the cleavage 

 of one of these great Sandstone beds, running in an unbroken plane, 

 from its top into the sea, at an angle of 44°, its water level bearing or 

 drifting towards the light-house at Berwick Pier-head. These Sand- 

 stones alternate with at least three Limestones and a variety of Shales, 

 clearly estabUshing that they belong to the Mountain Limestone group." 



One of the beds of Limestone near Scremerston, presents a singular 

 example of extreme contortion (^see Fig, 3), the disturbing force would 

 appear here to be very local as the beds within 20 yards are not af- 

 fected. 



Fig. 3. 



/::^?^._.^-:^^ 





V-, 



As some Geologists have entertained rather singular ideas respecting 

 these alternating Limestones, I beg to state that the following fossils 

 occur in them in considerable abundance : — Encrinites, MadreporiteSf 

 Terebratuloe, Spiriferce, and Froductce. 



To make the proper position of the Red Sandstones appear still more 

 clear, I subjoin a table of the stratification of the coast of Northum- 

 berland, from the Red Sandstone rock of Scremerston Mill-house, 

 to the great formation of the Red Sandstone between Scremerston 

 and Berwick. This table shews the alternation of these beds to 

 continue to the Tweed. 



