374 W. A. E. USSHEB, ON THE TMASSIC 



and brown' sandstone, enclosing nodnles of marl, and containing 

 Estheria, plants, traces of fish-scales, and a Reptilian bone — in all 

 3 feet 6 inches thick, and resting npon marls exposed to a depth of 

 more than 50 feet. 



At Knap, he gives a section of beds to which he assigns a lower 

 position than those exposed in the North-Curry section : — 



ft. in. 

 Variegated marls with a hard grey baud of stone 2 inches thick 10 9 



Grey sandstone in thin courses 3 



Sandstone 1 10 



Eedmarl 1 10 



Grey sandstones 10 11 



28 4 



Near Stoke St. Mary, Mr. Moore noticed thin beds in the 

 Keuper containing Posidonomya minnta. 



Upon the south-eastern flanks of the Quantocks, between North 

 Petherton and Durston, beds of rock-sand rest upon the Devonian 

 strata, and attain their greatest superficial breadth (of one mile 

 and a half) between St. Michael's church and Thurloxton. From 

 North Petherton they gradually diminish in superficial breadth upon 

 the north-eastern flanks of the Quantocks ; and at Enmore, where 

 they are in parts slightly brecciated, they disappear beneath the 

 overlying marls, which rest directly upon the older rocks for a dis- 

 tance of three miles. At this point a deep valley has been cut 

 through the marls, exposing sandstones resting upon the older rocks 

 and continuing for a mile down the valley to a point beyond Spaxton, 

 where they are apparently cut off by a fault bringing down marls. 



The area between Pridgewater and the Quantocks is character- 

 ized by the presence of numerous inlying hills of Devonian grit, and 

 by the prevalence of faults in an easterly and ^westerly direction ; 

 three of these to the north of Pridgewater are especially noticeable, 

 as they intersect the Triassic area, affecting its component marls and 

 sandstones between the alluvial flats of the river Parret and the 

 slopes of the Quantocks. 



The Devonian inliers are frequently flanked by beds of sandstone, 

 as at Cannington and Padlet farm ; but the overlying marls seldom 

 allow more than a partial exposure (of sandstone) upon their flanks. 



Petween Charlinch and Cannington, beds of sandstone are inter- 

 calated with the marls, and are either passage-beds between them 

 and the marginal sandstones upon the Quantock slopes, or a local 

 modification caused by the interchange of calcareous matter as fine 

 mud with arenaceous sediment. 



Upon Wembdon Hill another modification of the Pridgewater 

 Trias is shown in the occurrence of hard bedded breccia, consisting 

 of subangular and occasionally rounded fragments in a matrix of 

 calcareous sandstone, and containing beds of sandstone unbrec- 

 ciated. These breccias are of very local occurrence ; as far as we 

 can judge by superficial evidence, they appear to occupy a position 

 at the base of the sandstones, as they are always found to pass up- 

 wards into them ; but the relations of the Wembdon sandstones to 

 the marls on the north and south, against which they are faulted, 

 cannot be definitely fixed, nor can we at present say whether the 



