274: EEV. p. B. BEODIE ON TWO EH^TIC 



The specimens were uumerous as usual, but the species few, and 

 very fragile ; they were not so abundant or well preserved as at 

 Summer Hill ; but owing to the small quantity thrown out, there was 

 less chance of finding many fossils. The only place where I have 

 observed any limestone with Rhsetic shells is at Brown's "Wood, but no 

 section is exposed there, the pieces of stone lying loose in the fields. 



I have previously * shown the presence of the Ehsetics in other 

 parts of the county, e. g. at Copt Heath, near Knowle, Brown's Wood 

 near Henley-in-Arden, and in a railway-cutting nearKineton. The 

 extension of this series is now indicated still further in a southerly 

 direction, and it probably regularly underlies the lower beds of the 

 Lias in their course through Warwickshire. 



I am indebted to the kindness of Mr. Willcox, the intelligent 

 engineer of the waterworks, who is also a geologist, for information 

 about the tunnel, and for the plan showing the section of the heading 

 No. 1. 



Discussion. 



Prof. Boyd Dawkins said that the section at Snitterfield was 

 precisely similar to one described by himself near Watchet. IS^ear 

 Watchet the Ehsetics dip at a considerable angle, and are repeated 

 by faults. The speaker doubted the erosion of the lower beds, and 

 thought that the appearance of deposition in pot-holes was due to 

 faulting. So far as he had seen, there was no change of dip between 

 Rhaetic and Trias such as would indicate unconformity. 



Mr. Etheeidoe also had never seen true unconformity between 

 the Trias and the Ehsetic. The finding of Ophiolepis was most 

 important, as showing the connexion with the same beds in 

 Germany. 



Mr. UssHEE, from an examination of the relations of the Ehaetic 

 beds between Alcester and Worcester, pointed out that the tea- 

 green marls formed, as do the buff marls of Somerset, a definite and 

 easily distinguishable junction with the red marls, and therefore he 

 considered that for mapping-purposes they should be included in the 

 Ehaetic. He did not think the section exhibited by the Author 

 could be taken as any indication of unconformity ; the only appear- 

 ance of unconformity he was acquainted with was at Newark, which 

 a more searching investigation might prove to be otherwise explain- 

 able. He inquired if the Oardium-7^hceticum shales, to which the 

 Author has assigned a definite position, were taken to represent the 

 White-Lias limestones, and whether the top bed (sunstone) was re- 

 presented in the sections. 



The Peesident pointed out that the main question on which diffe- 

 rence of opinion had arisen was whether there was evidence of the 

 Triassic beds having undergone erosion before the deposition of the 



* " On a further extension of the Ehsetics in Warwickshire, Leicestershire, 

 Nottinghamshire, Rutland, Lincolnshire, Yorkshire, and Cumberland," ' War- 

 wickshire Naturalists' Field Club Proceedings,' March 1875. 



