Vol.62.] 



LIMESTONE AT CANNOCK CHASE. 



52' 



There can be no doubt whatever that the limestone was met with 

 in one of the exploring-heads immediately before , the abandon « 

 of the undertaking. Either the lower beds of the CoahMea^mres 

 thin rapidly to the north, or else a nse-fault was met with as 

 shown. The position occupied by the limestone on the waste-heap 

 noints to its having been the last material deposited there. 

 1 About 5 miles north-west of Fair Oak, in Wolsley Park, a bore 

 hole has lately been put down to prove the Coal-Measures. The 



Fig. 2.— (Seep. 526.) 



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With- 





Scale:-i inch=200 yards. 



depth bored was about 396 yards ; and Mr. Walcot Gibson, in the 

 Transactions of the North Staffordshire Field-Club, 1903-1904, 1 

 expresses the opinion that the strata below a coal-seam at 257 yds. 

 2 ft. f) in. suggest that the boring passed through the Lower 

 Coal-Measures and ended in Millstone Grit. 



These evidences of Carboniferous Limestone and Millstone Grit 

 are the first that have been brought forward to prove the existence 

 of the Lower Carboniferous rocks under the Cannock-Chase portion 

 of the South Staffordshire Coalfield. 



Discussion. 



Prof. Bonney said that, as he had known this part of Cannock 

 Chase before the Fair-Oak pit was sunk, and had been aware of the 

 discovery of Carboniferous marine fossils before it was communicated 

 to the Author, he would add a few words. Some four years ago his 



1 ' Sections of Boreholes & Wells in the County of Stafford ' p. 123. 



2n2 



