and around the Warwickshire Coal-field. 555 



At the time of my visit, April, 1886, the debris from the pit was 

 in a fresh condition. The character of the shales left no doubt that 

 they were of Silurian age, and probably of the same age as those 

 that crop out at Marston Jabet. Some of the fragments were inter- 

 sected by veins of gypsum, doubtless derived by infiltration from 

 the Trias above. No fossils have been found. 



Nuneaton : centre of the town. 210 feet above Ordnance Datum. 1 



Drift (sand, gravel, and clay) 18 feet. 



Bed Marl 12 „ 



Lower Keuper Sandstone [Waterstones] 80 „ 



Hard slaty white rock [probably Hartshill Quartzite] . . . 2 ,, 



112 „ 



Lindley Hall Estate ; boring near the Fenn Lanes. About three miles north 



of Nuneaton. 



Soil, red clay, etc., (Drift) 6 feet. 



Eed marl with red and blue rock and gypsum 456 ,, 



Blue, red, and browu rock with marl, probably Water- 

 stones 181 ,, x 



643 „ 



Hinckley Wharf, about three miles east-north-east of Nuneaton, 313 feet above 



Ordnance Datum. 1 



Glacial Drift Sands and Boulder-clay 88 feet. 



Red Marls Eed gypseous marls with bands of grey sandstone ... 408 ,, 



Waterstones Eed, grey, and brown sandstones with bands of marl 209 ,, l 



705 „ 



This boring is nearly midway between the exposures of Palaeozoic 

 rocks at Nuneaton and Sapcote, and is probably near the deepest part 

 of the trough of Triassic rocks separating these localities. It shows 

 that the lower sandy beds of the Eed Marls, which are distinguished 

 by the name of the Waterstones, increase rapidly in thickness on 

 receding from the old land-barriers or islands, formed by the harder 

 parts of the Silurian and pre-Silurian series. In this they may be 

 compared to the impersistent sandy and conglomeratic beds which 

 form the base of the Coal-measures, as previously described. 



Hinckley ; at the Holy Well, 330 feet above Ordnance Datum [should be 421]. 2 



Drift (pebbly clay, sand, and gravel) 150 feet. 



Eed marl 20 ,, 



Lower Keuper Sandstone (viz. thin beds of clay and 

 gypsum alternating with thick beds of red, grey, 

 and white sandstone) [Waterstones] 370 ,, 



540 „ 



1 Eeport of the British Association for 1882. Eeport on the Circulation of Under- 

 ground Waters, pp. 14, 15, where the section is given in full. 



2 Eeport of the British Association for 1875 (Eeport of the Committee on the 

 Circulation of Underground Waters), pp. 136, 137. For a further account of the 

 Hinckley Boring see Eeport for 1879, p. 160. 



