304 



PROCEEDINGS OF THE GEOLOGICAL SOCIETY. 



deposits of that description, then presented itself above the chalk, 

 along the whole of the line a b d. 



Subsequently, the uncallow was removed also from the space 

 b a g m (about 15 feet by 9 feet) ; and afterwards, to the whole 

 extent of that space, and of the triangular space cab, the chalk 

 was worked away, and a vertical section of the uncallow was then 

 exposed above the lines G m and m b. 



At c was a large conical pot. At I and k, in the floor of the 

 excavation b c e d, were horizontal sections of two cylindrical 

 pots, each about 2\ feet in diameter ; and, as the workmen stated, 

 these pots had been of the same diameter throughout their whole 

 lengths of 55 feet ; and at that depth from the surface of the 

 chalk there was no appearance of their terminating. Most of the 

 pipes in this pit extended, as the workmen stated, to the very 

 bottom ; though occasionally a pipe, on its meeting with a layer 

 of flints, would stop abruptly. At l was another large pot. 



On the surface of the chalk, in the triangular space cab, were 

 several circular basins, about 10 inches in diameter, and 2 or 3 

 inches deep in the centre : there were also several very shallow 

 irregular furrows. 



On the outer margin of this space, extending from the pot c to 

 a, were the remains of a deep curvilinear furrow ; from a to b 

 was a straight deep furrow, communicating at b with the pipe l ; 

 and parallel to a b was another deep furrow, extending from 



G tO M. 



Fig. 2. Thorpe Chalk Pit. 



(Cross Section of the two Furrows G M and A B, from OfoN.) 



W. E. 





'". """" 



/-. - 



r I .. " 1 .' \\ 



1 





1 



at 





V 5 \ 



\0\J 



1. The solid chalk. 



2. The bottom of the furrows G M and A B, filled with sand, umber, and 

 yellow ochre, and sometimes containing thin layers of chalk. 



3. Layer of reconstructed chalk. 



4. Sand (a.) represents a projection filled with umber. 



A cross-section of these two furrows, on a line n o, nearly 

 midway between the points a and b, is represented in fig. 2.; 

 and fig. 4. is another transverse section of the same two fur- 

 rows, drawn through the points a and G. On each of the above 



