Vol. 50.] ON THE PURnrcCK BEDS OF THE VALE OF WA.RDOUR. 55 



The section exposed in the railway-cutting, \ mile south of Tef- 

 font and on the southern sido of the river, carries the Beriea still 

 higher, and shows also that a certain lateral change takes place in 

 the higher beds as they are followed from west to east. This section 

 is now partially obscured by talus and turf, but was measured by 

 one of us in 1880, when the beds were all clearly exposed alone,' its 

 whole length ; and even now, by combining exposures on tho northern 

 and southern sides of the cutting, the following descending suc- 

 cession can be made out : — 



Feet. Iuches. 



Wet grey and yellow sand 3or4 



Light -grey sticky clay 1 



Soft marly clays, with thin, brown, iron-stained layers 2 



Light buff-coloured marl 4 



Hard, whitish, grey-hearted silty limestone, weathering into 



angular blocks with vertical fracture 1 



Soft, laminated, grey and brown, sandy marls and clays, with some 



shelly layers and a seam of ' beef ' 2 



Rather hard, brown and grey, sandy stone 6 



Brownish sandy clay, witli thin irregular and lenticular seams of 



sandy limestone 1 



Hard, buff -coloured, sandy limestone, laminated at top and bottom ; 



contains large. Ci/rence 1 



Soft shaly marl, with crushed shells 6 



Layer of beef , 1 



Laminated shelly marls, brown, yellow, and whitish, very hard 



in parts, full of bivalve shells 10 



Hard, grey, marly limestone (Archcgoiiiscus-bed), containing also 



Ostrea distorta, Corbules, and a Cardium 6 



Grey sandy limestone 2 



Dark- brown ferruginous sandstone 3 



Soft sandy limestone ... 2 



White fissile limestone, splitting into layers from 1 to 2 inches 



thick 1 4 



Hard shelly limestone, here very thin 1 



Soft whitish limestone 8 



Layer of ' beef 2 



Soft, laminated, shelly limestone, full of crushed shells (> 



Chalcedonic chert full of Cyclas from 1 incli to 3 



Brown clay 2 



Cinder-bed, very hard in places, loose and soft in others ; Ostrea 



distorta, Trigonia gibbosa, and Tr. densinoda 2 6 



Hard blue-hearted limestone in two or three courses, with marly 



partings, Ostrea and Univalves 3 



Yellowish sandy limestone 1 



Dark clay 2 



Hard grey marlstone, First LrAS 1 6 



Grey clay 2 



Hard, grey, shelly limestone t^the Flagstone) 2 



29 6 



The above seetion was described by one of us in 1SS1, and was 

 accompanied by a diagrammatic view of the vertical succession ; but 

 it should be mentioned that this was a generalized view, every bed 

 seen in the cutting being inserted, and was not a vertical section 

 taken at any one point. Thus the shelly limestone underlying the 

 fissile limestone, which was only 1 inch thick where our section was 



