77 



from the conglomerate beds of the New Eed Sandstone, Eed 

 Silicious Sand, Lickey Quartz, MiUstone Grit, Coal Measures, 

 Igneous Rocks, Coarse Granite from Cumberland or Scotland, 

 Silurian Slabs with fossils, Old Eed, Flint, Chalk, &c., &c., &c. 

 This I subdivide into five parts : — 



a.— That which occurs at an elevation of about 750 feet 

 on the Cotteswolds, and extends down to where the cretaceous 

 flints first appear, and is chiefly composed of rather sub-angular 

 and rounded quartzose Pebbles. 



b.— That which extends from the point where the cretaceous 

 flints are met with, to the highest beds containing mammalian 

 remains ; in this division every above-mentioned description of 

 drift is found. 



c. The highest mammalian drift which is variable in 



character, but does not differ essentially from the last. 



d.—A terrace at an altitude of about 40 to 50 feet above 

 the present rivers. 



e. The lowest mammalian drift from 15 to 25 feet above 



the present level of the rivers. 



/SfecorwZ,— The Oolitic Gravel forming most of the beds east of 

 the Severn lying near, and flanking the Cotteswold range ; this 

 may be divided into upper and lower Mammalian Oolitic detritus, 

 and also some beds of Oolitic debris occurring at a higher 

 elevation on the flanks of the hills. 



Third,— The small sub-angular Oolitic Gravel which is found 

 at a height of 500 to 700 feet, and is composed of the debris or 

 weathering of the freestone of the inferior Oolite, and considered 

 by Mr. Hull in his memoir to be raised sea-beaches.''^ 



Beginning where the lowest level of the gravels that I have 

 undertaken to describe, and which occurs at Gloucester ; and 

 then taking the left half of the map, which includes the hills 

 to the west of the Severn, the valley through which that river, 

 the Avon, and the Arrow flow on their way to the sea; and also 

 the greater part of the western escarpment of the Cotteswold 



• " Mem. Geol. Survey Great Britain; Geology of the Country around Chelten- 

 ham," 8vo. By E. Hull, Esq.. B.A. and F.G.S. 



