VOL. xviii. (2) MEMOIR. MAP OF CHELTENHAM 125 



MEMOIR EXPLANATORY OF A MAP OF A 

 PART OF CHELTENHAM AND NEIGHBOURHOOD, 

 SHOWING THE DISTRIBUTION OF THE 

 SAND, GRAVEL AND CLAY 

 (6-inch Series xxvi., S.E.) 



BY 

 L. RICHARDSON, F.R.S.E., F.L.S, P.G.S. 



In part, 3 volume xvii., of the " Proceedings " of the 

 Club, a map was published which showed the distribution of 

 the sand, gravel and clay in the northern part of Cheltenham 

 and in the surrounding country, together with a descriptive 

 memoir/ 



A map (Plate XVI.) showing the geographical distribu- 

 tion of similar deposits in the district immediately to the 

 south of that represented on the above-mentioned map, is 

 now pubhshed, and the present memoir is in explanation. 



The geological information given on this map has taken 

 nlany years to acquire : it was obtained principally between 

 1902 and 1912. As in the case of the previous district, its 

 collection was not always an easy matter, for considerable 

 portions are built over or are covered with private gardens. 



Lias.— This is the name given to the series of rocks that 

 comes between the Rhsetic (which crops out above the Keuper 

 Marls at Wainlode Chff, on the banks of the Severn), and the 

 Umestones that cap Leckhampton Hill, which have been and 

 still are so extensively quarried there. 



The Liassic Series has been divided into three Stages : 



(i) Upper, 



(2) Middle, and 



(3) Lower. 



I Proc. Cotteswold Nat. F.C., vol. xvu.. "pt. 3 (1912). PP- 297-319. and P^- xxxiii.-xxxvi. 



