414 On the ROCKS in the 
The two laft of thefe are not comprehended in the Coal For- 
mation fuite; they are confidered as members of another for- 
mation, denominated the Neweft Floetz-Trap. 
THE upper fandftone of St Leonard’s Hill, and the lower 
fandfione of Salifbury Craig, are, fo far as we know, continu- 
ous; but as thefe, fuppofing the lines of the ftrata to be pro- 
jected, would form a bed of 450 feet thick, it is poflible 
alternations of greenftone may occur in it. Above, I have on- 
ly mentioned fuch as are vifible. 
Tuose on the right of the Hunters’ Bog, are not fo diftin@ly 
expofed as the reft ; but the foffils are all found in the order I 
have ftated. Occafionally fmall feams of reddifh-brown co- 
loured flaty clay, and clay-ironftone occur, principally inter- 
mixed with the fandf{tone; but they are fo thin, and fo uncon- 
nected, that they can fcarely be confidered.as ftrata. 
THE feries of {pecimens I.am now about to defcribe, are thofe 
of St Leonard’s Hill and Salifbury Craig. 
No. 1. is a fpecimen of the Sandftone of St Leonard’s Hill ; 
it is of a reddifh-white colour, and extremely coarfe-grained. It 
was taken from the middle of the quarry, and pretents a fpe- 
cies of conglomerate, the fragments of fandftone being agglu- 
tinated by a dark-red ferruginous patte.. 
No. 2. from the fame quarry, is more compact, and prefents 
a ftreaked appearance, correfponding with the direction of the 
ftratum. There is a confiderable degree of irregularity to be 
obferved, in tracing the line of junction at St Leonard’s Hill. 
In fome places, two or three folds of the ftrata are cut off 
abruptly 
a name which, though perfeGly underftood in this country, is not received 
abroad, and ought therefore to be relinquifhed. 
