1857.] HULL TRIAS AND PERMIAN. 219 



as late a period as that of Lenmos and the other volcanic centres 

 which have torn up the bed of the lacustrine basin, because I observed 

 the summit of one of the highest ridges of Marmora to be capped by 

 horizontal beds of what appeared through the glass to be red and 

 brown marls and gravels. 



These fragmentary remarks on the Dardanelles and Sea of Mar- 

 mora, made for the most part during the commencement of the late 

 war, although incomplete, will serve to call the attention of geologists 

 to the interesting field of inquiry as to the boundaries and age of 

 this great Oriental (if not also, in part, Mediterranean) lake or chain 

 of lakes, as (it seems to me) indicated by detached freshwater deposits 

 along the ancient margins. 



November 4, 1857. 

 Robert White, Esq., West Cowes, was elected a Fellow. 



The following communications were read : — 



Li On the Triassic and Permian Rocks of the Odenwald, in the 

 Vicinity of Heidelberg, and the Corresponding Forma- 

 tions in Central England. By Edward Hull, Esq., A.B., 

 F.G.S. 



The resemblances and general relations of the Trias and Permian 

 formations of the Thuringerwald and Hartz, with their representa- 

 tives in England, have already been pointed out in the joint memoir 

 of Sir R. I. Murchison and Professor Morris*. The present com- 

 munication refers to a neighbouring range of hills, destitute, it is 

 true, of that fine assemblage of palaeozoic rocks below the Permian, 

 which have been shown to abound in the Hartz and Thuringerwald, 

 but, in the case of the more recent formations, presenting many 

 points of analogy with their contemporaries, both in the regions re- 

 ferred to, and in Central England. 



It has been shown by Professors Sedgwick and King, as also by 

 the authors of the memoir on the Hartz, that the Permian groups 

 of Germany and this country can be strictly contemporanized, stra- 

 tum for stratum. In visiting the Odenwald, it was partly my object 

 to ascertain whether a similar parallelism might be observed in the 

 case of the Trias. In doing so, however, occasion was taken to 

 examine the Permian formation, which, though only sparingly repre- 

 sented in the Odenwald, presents those peculiar lithological characters 

 which appear to identify it, not only with formations in the Thurin- 

 gerwald and Hartz, but also with the trappoid breccias of Worces- 

 tershire. 



Since the establishment of three well-defined subformations in 

 the Bunter Sandstone of England, a notice of which I had the 

 honour of laying before the Geological Section of the British Asso- 



* Quart. Journ. Geol. Soc. vol. xi. 

 VOL. XIV.— PART I. Q 



