By Mr. Cunnington. 131 



as the Elephant, Hippopotamus, Rhinoceros, &c., &c., which were 

 deposited in it during the progress of its formation ; whence its 

 name. From the circumstances of its origin, the Drift necessarily 

 consists of very varied materials, and in a county containing such a 

 variety of strata as Wiltshire, we might reasonably expect to find 

 a corresponding variety in the character of this deposit. On ex- 

 amination this proves to be the case. 



At Chisenbury, Netheravon, Bulford, and in many of the neigh- 

 bouring villages, it is composed of small fragments of hard chalk, 

 flints, &c., constituting a rough calcareous gravel ; and a similar 

 kind of Drift occurs in most of the narrow valleys of the chalk 

 tracts. 



In the valley of the Avon, in the northern part of the county, 

 where the rocks are much varied, the Drift contains fragments of 

 many kinds. Thus at Broughton Gifford, which place I had the 

 pleasure of visiting last month with my friend Mr. Prestwich, 

 (Treasurer of the Geological Society,) under the guidance of the 

 Rev. J. Wilkinson, it may be described as follows ; and this fur- 

 nishes a good example of what may be found in many parts of this 

 interesting district. 



:;;:;-Or- — ->j::: 5^^^^^^^- I Surface soil, passing into 



'^ Brick Earth " a dark reddish biowii, 

 / and very sandy clay, 3 or 4 fcet. 



U 



" Drift," consisting chiefly of rolled 

 frugmeuts from the Kelloway Kock, and 

 Oxford Clay, intercalated with irregular 

 seams of sand ; it contains also subangu- 

 lar Chalk-flints, and rolled masses of 

 Chalk, Lower Green Sand, Coral Rag, 

 Forest Marble, &c. about 5 fcet. 



" Oxford Cluij," with soptarin. 



millon of the Drift lit 

 UrniiKhUin (iilfnrd. 



