"Vol. 67.] WEST, MID, AND EAST SOMEESET. 37 



C5aA 



[Cossingtou.] Thickness in feet inches. 



"(1) Shales, black, laminated 2 6 



("Limestone, earth y, ferruginous ... 1^ Saurian hone. 



Shale, black : 1 to 2 inches li")™? 7 



(2) J Limestone, shelly, nodular : to I Ch ^f s ™ l °™™™ 

 I 4 inches. 2*3 ( Defvance )' 



L'Beef 1* 



(3) Shales, black: 12 to 18 inches ... 1 3 

 5 b. Limestone, eartiry, shelly, with 'beef 



on the top 6 



6. Shales, black 1 



7. Limestone, earthy, with one or two 



layers of ' beef ' on the top 5 



8. Shales, black 



6 3 seen. 



Indications of lower beds were obtained on the escarpment at 

 Cock Hill, where, at the point at which the by-road from Chilton- 

 upon-Polden leaves the main road, an excavation made in connexion 

 with extensions to a house revealed Black Shales with pieces of rock 

 full of fish-remains (Bed 15). 



The rock was of two types. The one was a black indurated mud with Acrodus 

 minimus, Gyrolepis alberti, Saurichthys (?) , small coprolites and quartz-pebbles — 

 very much the same as the fossiliferous indurated black shale above the Bone- 

 Bed at Lilliput, near Chipping Sodbury, Grlos. (see Q. J. Gr. S. vol. lx, 1904, 

 p. 197). The other type was more of the typical Bone-Bed facies, being a hard, 

 grey, micaceous sandstone, as at Charlton Mackrell and Langport, with the 

 usual fish-remains. 



Almost in front of the ' tower ' a road descends the escarpment, 

 and in the area between it and the Bridgwater Road were found pieces 

 of a yellowish micaceous sandstone -layer similar to Bed 19 at 

 Langport. 



In the neighbourhood of Edington and Catcott there are three 

 quarries in work, namely : 



(1) the ' Catcott Quarry,' which is situated just over half-a-mile south-by- 



east of Catcott Church ; 



(2) the ' Edington Quarry,' which is about half-a-mile west-north-west of 



Catcott Quarry ; and 

 (3). another quarry, a little over a quarter of a mile north of the latter. 



In the first two, the uppermost beds of the White Lias proper 

 are seen with the basement-beds of the Lower Lias above them ; 

 while in the third, only the White-Lias ' Dew-Stones ' occur. 



Some care is required in fixing the line of demarcation between 

 the Rhaetic and the Lias in this neighbourhood; but the White 

 Lias proper is only thin, as was shown by a very interesting section 

 in a quarry in a field by the side of the Bridgwater Road, about 

 half-a-mile north-east of Greinton. When I first visited this section, 

 the quarry was being worked along the strike of the beds and also 

 along a fault-line. On the south side of this fault were the Lower 

 Liassic beds and the Dew-Stones — the beds nearest the fault being 

 vertical, but the others soon declining away from it. On the other 

 side of the fault, the Cotham Marble was seen bent round in a 

 peculiar horseshoe curve. On my next visit the quarry had been 

 developed, and this interesting bit of faulting obliterated ; but the 





