INTRODUCTION. ii 



strata of the coast, from the Humber to the Tees, in the order in 

 which they occur; noticing the breaks, contortions, and other phe- 

 nomena which they exhibit ; and stating their connection with each 

 other, and with the strata of the adjoining districts, as far as has been 

 ascertained. In this part of the Survey, the authors have aimed at a 

 simple detail of facts and appearances ; avoiding, as much as possi- 

 ble, all those terms and phrases which involve any particular theory. 

 The Map and Sections, accompanying this part of the work, have 

 been constructed with care, and will, it is hoped, give the reader a 

 clear idea of the extent and relative positions of the strata. 



The Second, Part enumerates and describes the petrifactions, 

 and other organic remains, found in the different strata, or in the 

 alluvial soil ; arranging them into their various classes, and pointing 

 out their several localities. This part, as may be inferred from a 

 remark made above, might have been extended to a much greater 

 length. The illustrative Engravings, which, in this department, 

 are of more value than verbal descriptions, are fully as numerous 

 as the proposed limits and price of the work would admit. 



In the Third Part are thrown together some general observations 

 on the facts exhibited in the two former parts ; accompanied with 

 hints and conjectures, designed to explain the phenomena presented,, 

 and to elucidate, in some degree, that interesting but arduous sub- 

 ject—the structure of the earth. This portion of the work will pro- 

 bably be deemed the least useful ; yet as the hints here thrown out 

 are chiefly suggested by existing phenomena, it is hoped that they 

 may be serviceable to the studious inquirer. Where the views 

 adopted by the authors militate against the favourite theory of any 

 of their readers, they expect from the reader that candour and indul- 

 gence which he himself has a right to claim from others. On subjects 

 involved in so many difficulties, mutual forbearance is indispensable. 



