606 MR. E. D. VERNOI^ ON THE GEOLOGY AND [DeC. I912, 



Permian, which here consists of highly false-bedded, calcareous, red 

 sandstones interbedded with red marls. On the weathered surfaces 

 of the sandstones the casts of large stems, often several feet in 

 length, of the Permian plant Walcliia imbricata Schimper are not 

 uncommon. A portion of one of these leafv branches is jSgured in 

 PL LIX, fig. 10. 



The presence of the conglomerate at Polesworth is important, as 

 showing that originally these beds extended throughout and beyond 

 this district, whence they have since been removed by denudation. 



The occurrence of pebbles of Keele Sandstone, together with the 

 abundance of the Carboniferous-Limestone pebbles described above, 

 strongly suggests that the Corley Conglomerates are unconformable 

 to the Keele Beds. The presence of such an unconformity is 

 rendered more probable by the manner in which one bed of con- 

 glomerate strikes across the district, and above all by the occurrence 

 of isolated patches of conglomerate apparently resting upon 

 different horizons of the Keele Beds. The following particulars 

 illustrate this fact : — 



Whit more-Park Boring, near Coventry. 

 Lowest Corley Conglomerate at 660 feet. 



Main Spirorbis Limestone at 1637 feet (base of the Keele Beds). 

 The Keele Beds are, therefore, 977 feet thick. 



Keresley Boring (445 feet above O.D.), 

 Corley Conglomerate exposed at Corley Rock (625 feet above CD.) half a 



mile west of the borehole. 

 Main ISpirorbis Limestone at 1113 feet (base of the Keele Beds). 

 Keele Beds 1413 feet thick. 

 At Corley Rock the Keele Beds would be about 1600 feet thick. 



Exhali. 

 Corley Conglomerate crops out at about 300 feet above O.D. 

 Main Spirorbis Limestone, dipping westwards at about 7°, is exposed in the 



Foleshill Clay-pit. 

 Thickness of the Keele Beds=about 650 feet. 



There can be little doubt, therefore, that the Corley Conglo- 

 merates are unconformable to the underlying Carboniferous rocks, 

 and that they constitute the basal member of the succeeding 

 Permian formation. 



The Permian, extends due southwards from the outcrop of the 

 Corley Conglomerate to within 2 miles of Warwick, where it is 

 unconformably overlain by Trias. At Spon End, Coventry, the 

 general dip of the Corley Conglomerate, which crops out at "Radford, 

 is south-westwards at 4°. 



The Kenilworth Sandstones. — In the Kenilworth Sand- 

 stones sections are very rare, but the nature of the beds can be 

 made out in the clay-pits and old sandstone-quarries at Coundon 

 and Allesley near Coventry, and at Kenilworth. The Whitraore- 

 Park Boring, near Coventry, penetrated 660 feet of these rocks 

 before reaching the Keele Beds. 



These beds consist exclusively of calcareous red sandstones 

 alternating with red marls, which are frequently spotted and 

 veined with green. Bed is the predominating colour, but the tint 

 varies considerably from red to chocolate ; while some beds are 



