XIV INTRODUCTION. 



repeated along the entire line, from Dimlington heights in Holderness, 

 to Redcar. 



It will thus appear that no pains have been spared to copy the 

 natural sections of this coast as perfectly as possible ; and when it is 

 added, that to complete my knowledge of the subject, I have assiduously 

 investigated and measured the interior of the country, have drawn up- 

 wards of four hundred species of fossils, and examined above a hundred 

 more, having received the most liberal and ample assistance from all 

 the collectors on the coast, and from many geologists in other parts of 

 the county ; it will not, I hope, be thought that this work has been 

 attempted without sufficient materials to render it useful. 



The strata which I have undertaken to describe, have received the 

 notice of several eminent geological writers ; they have been, in some 

 degree, illustrated by the general map of Mr. Greenough, and by the 

 remarks of Mr. Conybeare, in his outlines of the Geology of England ; 

 by the comparative view which Mr. Murchison has given of the analo- 

 gous strata discovered at Brora ; and by Professor Sedgwick's paper * 

 on some parts of this district, in which he has shewn the identity of 

 the alum shale of Whitby, with the lias of Dorsetshire, and of the 

 Scarborough oolite and its subjacent sandstone, with the coralline 

 oolite and calcareous grit of the southern counties, and has successfully 

 compared the substratum of the vale of Pickering with the Kimmeridge 

 clay. But these publications are far from embracing the whole of the 

 subject, nor have I borrowed from them anything but a confirmation 

 of rny own deductions. The details of the present work have been 



* Annals of Philosophy for May, 1826. 



