XV. Description of a series of Specimens from the Plastic Clay near 

 Reading, Berks : with Observations on the Formation to "which 

 those Beds belong. 



By the Rev. WILLIAM BUCKLAND, 



MEMBER OF THE GEOLOGICAL SOCIETY, 

 AND PROFESSOR OF MINERALOGY IN THE UNIVERSITY OF OXFORD. 



[Read 6th January, 1816.] 



CONTENTS. 



Description of Beds of the Plastic Clay formation above the Chalk at Heading. 



Extent of this formation of Plastic Clay. 



Appearance of the same near London. 



Sections at Woolwich, Lewisham, Blackheath, Plumsted, and New Cross. 



Other localities of this formation in the London Basin. 



Appearance of the same on the coast of Sussex. 



Sections near Seaford and Newhaven. 



Plastic Clay near Arundel. 



Connection of beds of the Plastic Clay formation in England with the French 



beds of the same era. 

 General character of the Plastic Clay formation in England. 

 History of the formation of the Marsh Lands immediately below London. 



JLlAVING an opportunity to visit Reading in July, 1814, I col- 

 lected a series of specimens numbered as below, which I beg leave 

 to present to the Geological Society. The pits whence they were 

 obtained are at the Catsgrove Hill Brick kilns, distant about half 

 Vol. iv. 2 n 



