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The whole of the peninsula of Wirral, except in the immediate 
neighbourhood of Neston and Burton, where the Coal-measures 
border the estuary of the Dee, consists in its solid geology of rocks 
of Triassic age. These rocks are usually covered with a mantle of 
Boulder Clay and other comparatively recent deposits. Some of 
the best building stones are quarried in the Keuper Sandstone at 
Storeton, Runcorn, and Frodsham. Organic remains are very 
rare in the strata of the Trias. The Storeton Quarries are cele- 
brated on account of the fossil footprints of an animal supposed to 
have been a batrachian called Cheirotherium Storetontnse (Morton). 
Recently this animal has been named Cheirosaurus. Numerous 
footprints of a smaller reptile known as Rhynchosaums are also 
found. A fossil plant, Equisdites Keupevina (Morton), has also been 
discovered. 
The highest hill in Wirral is Heswall Hill, which is 360 feet 
above sea-level, the strata being Keuper Sandstone. Bidston Hill 
is formed of Keuper Sandstone resting on Upper Bunter Sandstone. 
Thurstaston Hill, which is about 240 feet above sea-level, consists 
of Upper Bunter Sandstone, with a capping of a coarse rock 
resembling the basement-beds of the Keuper Sandstone. 
The hills about West Kirby are formed of Upper Bunter 
Sandstone, upon which the Keuper Sandstone rests. At Storeton 
the Keuper Sandstone is faulted against the Upper Bunter Sand- 
stone, and there is, on the hill to the left hand side of the main 
road, going south, a small exposure of Keuper Marl, which is at 
the present time in process of being covered, owing to the filling up 
of a quarry for building purposes. 
The Keuper Marl occurs in the north of Wirral, in the district 
between Leasowe Castle and Irby, but it is obscured to a large 
extent by a covering of Boulder Clay. The marl also occurs at 
Upton, Arrow, Oxton Hill, Moreton, and Saughall Massie. The 
Waterstones, which are the basement-beds of the Keuper Marl, can 
be examined at Upton; Lower Keuper Sandstone forms the bed 
rock at Frankby. At Prenton the Lower Keuper Sandstone rests 
upon the Upper Bunter Sandstone. The latter subdivision also 
occurs at Thingwall, Barnston, and Gayton. Hilbre Island, 
Middle Island, and Little Eye belong to the Pebble-beds. 
At the recent cutting at Liscard and Poulton Railway Station, 
the Lower Keuper Sandstone rests on the yellow strata of the 
Upper Bunter Sandstone. The Keuper Basement-beds are the 
solid rocks at Wallasey, Liscard, and Poulton, The Pebble-beds 
