352 MR. RICHARDSON ON NON-SEQUENCE BETWEEN [Aug. I904, 



It may be as well to mention here that had the term ' Bone-Bed ' 

 been applied to any bed yielding vertebrate-remains, then in the 

 Crowle section the series of sandstone-layers alternating with 

 shale, and 20 inches above the Bone-Bed-equivalent, would have 

 had to have been thus denominated. But the deposit (Bed 15) 

 is frequently seen to be of ' Bone-Bed ' nature, especially at 

 Denny Hill, near Gloucester, and in places in the Garden-Cliff 

 section. 



The section in the railway- cutting at Dunhampstead shows 

 the same sequence of deposits as the Crowle exposure, together 

 with higher beds ; but from the account of this section given 

 by Mr. W. J. Harrison, F.G.S., and my own observations, there 

 seems to be little doubt that the Rhretic rocks are thicker 

 here than at any other locality in Worcestershire ; this 

 is certainly the case with the beds that are visible. The Bone- 

 Bed-equivalent at Dunhampstead is a massive bed, with a maximum 

 thickness of 30 inches. 



About 7 miles across country, in a south-easterly direction, is an 

 exposure at Abbots (Hob) Lench, where it is important to note 

 that, instead of a sandstone-bed resting upon the ' Tea-Green Marls,' 

 the Bone-Bed-equivalent itself (14 inches thick) is seen to be 

 separated by a deposit of shale, only about 28 inches thick, from 

 the Keuper Marls. This means that the sandstone-bed, which at 

 Dunhampstead was seen resting directly upon the Keuper Marls, 

 is absent here. As I have elsewhere stated, 1 this Bone-Bed-equi- 

 valent partakes of the nature of a true Bone-Bed in this village ; 

 for, from a well sunk here, were obtained pieces of typical pyritic 

 rock charged with fish-scales and some other vertebrate-remains. 



At Marl Cliff, on the borders of Worcestershire and Warwick- 

 shire, a thin layer of sandstone (with a few fish-scales, and but 

 an inch thick) is the Bone-Bed-equivalent, and is separated from 

 the ' Tea-Green Marls ' by 2 feet of Black Shale ; a state of affairs 

 somewhat similar to that noted at one part of Wainlode Cliff. 

 Concerning the Bone-Bed of Worcestershire, Strickland wrote : 



' It appears, however, that this stratum, which in East Devon, Somerset, and 

 Gloucestershire is so highly charged with organic remains, loses its ossiferous 

 character when we enter Worcestershire. Its identity, however, is not lost ; 

 and when it is considered that from Asmouth on the south to Dunhamstead 

 on the north is a distance of about 112 miles, we have a remarkable instance of 

 the continuity of a very thin stratum over a great distance.' 2 



Proceeding now from Wainlode Cliff in a more or less south- 

 westerly direction, the first section to be noted is in the railway- 

 cutting at Lassington. This section is now so much overgrown that 

 very little, and nothing definite, can be made out. W. C. Lucy 3 

 stated that the ' Bone-Bed ' and ' paper-shales ' of Westbury are 

 absent, while the Rhsetic Beds are represented by a band of 

 stone 6 inches thick, in which Pseudomonotis decussata occurs. 



1 Geol. Mag. 1903, p. 81. 



2 'Memoirs of H. E. Strickland ' 1858, p. 157. 



3 Proc. Cotteswold Nat. F.-C. vol. viii (1886) pp. 216, 225. 



