SERIES OF THE DEVON COAST-SECTION. 



155 



Rock at Nottingliani, on the JsTottingham Porest, at Sneinton *, 

 and in many other places in that district. We thus get about 

 200 feet of beds in the Devon coast-section, with a distinctly 

 Middle Bunter facies, just in the position, vt^ith reference to the 

 Keuper, in which we should be prepared to find them, if wo recog- 

 nized in the current-bedded sandstone series between them and the 

 Keuper basement-beds the equivalents of Prof. Hull's Upper Bunter. 

 The Deep Red Marls which crop out beneath the pebble-bed in 

 the cliff at Budleigh Salterton differ, so far as I have observed 

 them, in some respects from the undoubted Keuper Marls to the east. 

 There appears to be just tbat difference which those who are familiar 

 with them could hardly fail to recognize between the Keuper and 

 "Permian " marls of Nottinghamshire. Of these latter I consider the 

 red marls at Budleigh Salterton the representatives. In colour, in 

 their fine argillaceous composition t, in their way of weatheriug, in 

 the frequent occurrence of small grey-green specks of more calcareous 

 material, in the apparent absence of any very distinct stratification, 

 there is, to say the least, a strong similarity between these and the 

 Permian Marls which are associated with the Magnesian Limestone 

 in Kottinghamshire. I have but little doubt that the weathering 



Diagram-section showing junction of the Biidleigh-Salferton 

 Pehhle-hed and Permian Marls. 



S. ofW. N.ofE 



?/ <^round. 



a. Marls of deep purple-red, referred to the Post-Carboniferous (Permian). 



h. The Budleigh-Salterton Pebble-bed, strongly current-bedded in parts, with 

 strong bands of coarse irony current-bedded sands intercalated. 



c. Coarse current- bedded irony sandstone, with pebbles of quartz and quartzite 

 and angular and subangular fragments of (in some cases) younger rocks 

 scattered through it (fragments of the marls a very common). A type of 

 pebbly sandstone very frequent in the Middle Bunter of the Midland 

 Counties. 



* There is at present (Sept. 1887) a very fine exposure of these beds in the 

 railway extension works in progress at this place. Above them lie about 

 8 feet of thin-bedded sandstones which, I think. Prof. H.ull would call Upper 

 Bunter. 



t This comes out in the superior qualities (compactness, hardness, density) 

 of the bricks made from them. This is well known in the Nottingham district ; 

 and at the Society's meeting I exhibited a portion of a very fine-grained paving- 

 brick made from these (Permian) marls at brick-works situated just below the 

 boundary of the pebble-bed, on the Exmouth road. 



m2 



