202 PROCEEDINGS COTTESWOLD CLUB 191 1 



(xxiv.-xxiii) Amusiuni-personatum-l.imestones [Murchi- 

 soncB, s. I.). — At Corn well (70 on map), above the Scissum- 

 Beds, are sandy limestones, frequently full of this noticeable 

 little pecten, which must doubtless be correlated with the 

 A .-personatum-coni3.imng limestones of the North Cottes- 

 wolds, Ebrington and Bredon Hills, etc. 



Conglomerate-Beds. — The precise time of formation of a 

 conglomerate-bed is often difficult to determine, and each 

 example must be considered separately. Thus the Con- 

 glomerate-Bed at Fawler may be of Truellei date, and that in 

 the Hook-Norton Cutting of late Schloenhacki. 



(iii-i.) Clypeus-Gxii (late Truellei and Schloenbachi). — Over 

 the south-western half of the district, the Clypeus-Gxit precisely 

 resembles, both as regards faunal and lithic characters, its 

 equivalent in the North Cotteswolds, but to the north-east, 

 it attenuates, and in the Hook-Norton cutting the loose, shelly 

 conglomerate referred to above, occupies its stratigraphical 

 position. 



Fullers' Earth. — Above the Clypeus-Gxii is the strati- 

 graphical position of the Fullers' Earth — in Dorset and Somer- 

 set a great mass of clay. A bed of rock called the " Fullers' 

 Earth Rock " is prominent in the Fullers' Earth of Somerset, 

 and separates the clay into two parts — an Upper Fullers' 

 Earth and a Lower Fullers' Earth. The median rock-bed is 

 of subcontracti hemera, and this is also the date of a portion of 

 the Great Oolite at Minchinhampton Common ; of a portion 

 of that exposed in the railway-cutting at Stony Furlong, near 

 Chedworth, and of a portion of the Oxfordshire Great Oohte 

 proper. Hence the deposit between the Clypeus-Grit or its 

 equivalent and the rock of subcontracti date in the Cotteswold 

 Hills and Oxfordshire corresponds, as regards stratigraphical 

 position, to the Lower Fullers' Earth of Somerset.' 



In Dorset and Somerset, portions of the Lower Fullers' 

 Earth are sometimes clays, and at others hmestones. . In other 

 words, limestones sometimes replace a greater or less portion 

 of the clays of zigzag and ftiscce hemerae. In the neighbour- 

 hood of Bath the deposit of zigzag hemera is clay and presum- 

 ably so is that of fusees date, ^^'hen the FuUers'-Earth clay is 



I Proc. Geol. Assoc, vol. xxii. (1911), pp. iti and 115. 



