Vol. 67.] WEST, MID, AND EAST SOMERSET. 71 



obtained may be given in the order in which they would be noted if 

 a walk were taken from Chew Stoke over Breach Hill, pastNempnet 

 and Butcombe Church, to near Pigeon House, and thence back again 

 by way of Butcombe and Nempnet Farm, West Stroud, and Grubble 

 and Pear-Tree Hills. 



Brief remarks on the beds under consideration in the Nempnet 

 outliers are contained in the Geological Survey Memoir on East 

 Somerset (1876, pp. 79-80). 



(ii) Stratigraphical Details. 



Breach-Hill outlier. — This hill is capped with Lower Lias. 

 At the hamlet is a quarry showing the Pleuromya Beds resting upon 

 the Sun-Bed of the White Lias proper. In the steep bank above 

 the road leading off the hill in the direction of Chew Stoke, pieces 

 of a Pecten Limestone (containing, with the characteristic lamelli- 

 branch Pteromya crowcombeia Moore, Placunopsis alpina and Gyro- 

 lejris alberti) and of a yellow sandstone, an inch thick, were found ; 

 while below are traces of the Tea- green Marls and a fine section 

 of the Red Marls. Similar beds are seen in the lane leading down 

 the western flank of the hill to Dewdown Farm. 



Nempnet-Butcombe outlier. — A succession similar to that 

 seen in the above-mentioned lane is to be observed in ascending the 

 hill opposite : the Tea-green Marls being apparently but 6 feet thick, 

 and the Pteria-contorta Shales only 8 feet. The Langport Beds are 

 exposed in a quarry in the field on the right, where the Pleuromya- 

 and Ostrea-Heds are seen above them. 



At Cuckoo's Nest the conglomerates for which that locality is 

 notable are excellently exposed. In descending the lane, the 

 succession is noted as follows : — 



'"Conglomerate, composed of pebbles of Carboniferous 

 Limestone embedded in a matrix of shell-debris and 

 calcite, through wbich are sparsely distributed fish- 

 scales and teeth, coprolites, and fragments of bone. 

 The shell-fragments are best seen on a weathered 

 surface, and are of Chlamys valoniensis, Isocy- 



\^ prina, etc. Ft. ins. 



C Limestone, rarely conglomeratic, containing not ") Q „ 



\ infrequently the usual Ehaetic fossils ) 



t_ Shales, black ; comparatively thin. 



Tea-green Maels. Marls, greenish. 



Between Cuckoo's Nest and Nempnet Farm is a large quarry in 

 the Johnstoni-, Ostrea-, and Pleuromya-Be&s, with the Sun-Bed and 

 immediately-underlying ' Cockle-Bed ' at the base. This Cockle - 

 Bed is a peculiar, cavernous White-Lias limestone. 



In the steep bank north-east of Butcombe Church the Butcombe 

 Conglomerate must be at least 8 feet thick, and contains some very 

 big pebbles of Carboniferous Limestone. 



Pigeon-House outlier. — In this outlier the Pteria-contorta 

 Shales are exposed at several places in the lane running along the 

 northern side ; and in a watercourse, under the ' o ' of House in 

 ' Pigeon House ' on the Geological Survey map, Sheet xix, I found 

 a Pecten Limestone. 



f Butcombe 

 j Conglom- 



West- I erate ' 



BUEY <j 



Beds. 1 



