PREFACE. 
This New Edition of my first Geological Work differs in some respects 
from the former one, yet not to such a degree as materially to change 
the character of the book. The description of the Strata is almost 
literally the same, and the catalogues of Organic Remains, though 
amended in particular parts, retain all their original features ; but the 
Synoptic Table has been thrown into a new and more useful form, 
the plates have been re-engraved with great care, and in some instances 
improved by more exact copying of the original drawings, a description 
of the highly interesting ossiferous deposit of Bielbecks has been in- 
troduced, and the Introductory Chapter which was designed to convey 
a general view of the state of Geology in 1829, has been omitted, as 
being no longer necessary or indeed quite appropriate in a topographical 
work suited to the year 1835. 
The labours of M. Ad. Brongniart, Dr. Lindley, and Mr. Hutton 
have made known some additional species of Fossil Plants discovered 
by my indefatigable friends, Mr. Bean and Mr. Williamson ; these new 
species are introduced into the Synoptic Table, which is also augmented 
by synonyms and references. 
Two journeys on the Continent, have enabled me to profit by 
personal inspection of several noble museums, especially those of Bonn 
and Strasburgh, and the rich private cabinet of M. De Luc. The 
