49 



These are separated from each other by from 550 to 750 feet 

 of unproductive strata, near the middle of which there occur 

 certain well-defined beds of red shale, from 130 to 250 feet in 

 thickness, which form a well-marked line of separation 

 between the two series. The Radstock Series consists in all 

 of 8 veins, viz. : — 



The Withy Mills Seam ... 

 Great Vein... 



Top Little ditto 



Middle ditto 



Slyving ditto 



Under Little ditto 



Bull ditto 



Nine inch ditto 9 inches to 



Total 



13 8 



The total thickness is considerable, but in no case is the 

 whole of this available in any one place. 



The Withy Mills vein and the 9 -inch vein are seldom 

 found in a workable state, and the former is absent over the 

 greater part of the district The Great vein and Slyving vein 

 maintain a tolerablj' uniform thickness, but they are (the 

 former at Glutton, the latter at Tyning pit, Radstock) divided 

 into two parts, several fathoms of strata occurring between. 

 The Top Little vein and Under Little vein vary very little in 

 any respect. The Middle vein and Bull vein are of good 

 workable thickness in the Kadstock neighbourhood, but 

 northward, as at Camerton and Timsbury, they both thin out 

 to a few inches, and become unworkable. The coal obtained 

 from the series is exclusively used for household purposes. 



The strata in which the veins of the upper series are con- 

 tained consist of shales alternating with a kind of sandstone 



