22 
worked. The insect beds probably occur here in their 
true position, though from the absence of any section 
I have not been able to identify them in situ. This 
is an isolated patch of Lias, about 15 miles from the 
main mass lying in a hollow of the Red Marl, but it may 
be reasonably inferred that it was formerly connected with 
it, in which case the Lias must have had a wider extension 
to the north-west. At Wilmcote the Rhetics were only 
detected by means of a shaft as we have already shewn. 
They were formerly quarried south of Wootton Wawen, 
where a good series of Rhetic fossils might be obtained 
if the quarries were now worked. The extent and entire 
thickness of the Rhetics, which cannot be accurately 
ascertained in this district, is much less in this county 
than in Gloucestershire, Somersetshire, and South Wales, 
where they attain a much greater importance and develop- 
ment. By far the larger portion of the county is occupied 
by the New Red Sandstone,* the upper Red Marls being 
traceable mostly north-west of Warwick towards Bir- 
mingham —-the underlying upper Keuper Sandstone} 
between Knowle and Hatton and occupying a considerable 
though irregular area to the west, and the underlying 
Red Marls and the lower Keuper Sandstone, the former 
* I think that the clearest and simplest division of the New Red Sandstone or 
. Trias would be as follows :— 
(1) Upper New Red Marls, which immediately succeed the Rhetic beds seen on the 
canal bank at Copt Heath, on the high road between Preston and Henley, where the 
upper sandstones have been cut through and are capped by the upper Red Marls on 
the rising ground to the south; a similar section is also exposed near Greenhill Green, 
south of Brown’s Wood, where the superior Red Marls are of considerable thickness, 
and at Wainlode and Westbury Cliffs in Gloucestershire. 
(2) Upper Keuper Sandstones—Shrewley, Rowington, Knowle, Lapworth, Claverdon, 
Tanworth, Wolverton, Preston, Henley, &c. 
(3) Lower Red Marls, which directly underlie the Upper Keuper Sandstone, well 
exposed at Rowington, and between that village and Warwick. 
(4) Lower Keuper Sandstones or Waterstones, which succeed the Lower Red Marls 
—Warwick, Cubbington, and towards Coventry, &c. 
+ I discovered an extensive mass of upper Keuper Sandstone near Edstone, which 
is not recorded in the Geological Survey Map of the district. 
