1844.] 437 



June 26, 1844. 



John Shaw, Esq., M.D., of Hop House, Boston, Lincolnshire, 

 was elected a Fellow of this Society. 



The following communications were read : — 



1. On the Stonesfield Slate of the Cotteswold Hills. By 

 the Rev. P. B. Brodie, M. A., F. G. S., and James Buckman, 



Esq., F.a.s. 



The district alluded to in this memoir is situated to the east of 

 Cheltenham, and includes the Cotteswold Hills, which divide the 

 county of Gloucester from parts of the neighbouring counties of 

 Oxford, Worcester, and Warwick.* 



The formations occurring in this district are the following : — 



Clays representing the Bradford clay, or those dividing 

 Great Oolite - ■{ the beds of the great oolite in Wiltshire. 



Stonesfield Slate and ragstone. 



Fullers' earth. 



Inferior oolite. 



Upper lias shale. 

 Lias - - ■{ 2. Marlstone. 



Upper shales of the lower lias. 



Inferior Oolite 



c 



IS: 



1. Upper Shales of the Lower Lias. These consist of blue 

 argillaceous deposits, sometimes, especially towards the top, inter- 

 mixed with clays of an ochreous yellow colour. The following are 

 amongst the most characteristic fossils : — 



Beleranites elongatus Pinna lanceolata 



Ammonites Henleyi Lima antiquata 



Crenatula ventricosa Area Buckmanni 



Cardinia (^Pachyodon) attenuata Terebratula rimosa' 



Modiola cuneata Trochus imbrieatus 



And some undescribed species of Gervillia, Area, and Spirifer. The beds 

 below the above present the usual lower lias fossils. 



2. Marlstone. A hard sandy stone, blue when first quarried, 

 but weathering of a brown colour. It forms the terraces seen on 

 the first ascent to the Cotteswold HiUs. These terraces, however, 

 being covered with grass, the rock is best studied in outliers, 

 such as are found at Churchdown, Dumbleton, &c., where the 

 stone is quarried for road-making. The following fossils are 

 peculiar to the marlstone in this neighbourhood : — 



* See a paper " On the Structure of the Cotteswold Hills, and Country 

 around Cheltenham," by Roderick I. Murchison, Esq., read the 14th March, 

 1832, and published in the Proceedings of the Geological Society, vol. i. p. 388. 

 It was afterwards printed as a separate tract. 



See also a " Report of a Survey of the Oolitic Formations of Gloucestershire," 

 by William Lonsdale, Esq., read the 19th of December, 1832, and abridged in 

 the same volume, p. 134. 



