6. Staffordian 



L0G4 DR R. KIDSTON, MR T. C. CANTRILL, AND MR E. E. L. DIXON. 



PART II. 



THE GEOLOGY OF THE TITTERSTONE CLEE HILL COAL FIELD. 



The so-called Millstone Grit ( = the Cornbrooh Sandstone) and the 

 Coal Measures of Clee Hill* 



Introduction. 



The interest of the Carboniferous of the Clee Hill lies largely in the incomplete- 

 ness and abnormal character of its sequence. For purposes of comparison it will 

 therefore be useful to enumerate all the palseontological divisions of the British 

 Carboniferous System. These appear on the left in the following table : — 



7. Radstockian Keele Group. 



'Newcastle Group. 

 Etruria Marls Group. 

 .Black Band Group. 

 5. Westphalian Middle Coal Measures. 



4. Lanarkian Lower Coal Measures and greater part of 



the Millstone Grit. 

 3. Pendleside Series Base of the Millstone Grit and the Lime- 

 stone Shales. 



2. Upper Avonian 1 1 ^ ■, . ,, T . r, . 



, T . . r Carboniferous Limestone Series. 



1. Lower Avonian > 



In the right-hand column are given the equivalent lithological subdivisions in 

 the North Staffordshire area, where the sequence, from the top of the Upper Avonian 

 onward, is complete. 



The Carboniferous of Clee Hill is divisible lithologically into — 



c. Coal Measures. 



b. Millstone Grit so called — the Cornbrook Sandstone. 



a. Carboniferous Limestone Series. 



To which of the palneontological divisions of the complete sequence does the Clee 

 Hill Carboniferous belong ? 



The identification of Lower Avonian or of Upper Avonian is based on faunas.} 

 The evidence need not be discussed here, however ; it is sufficient for our purpose 

 to state that in Dr Vaughan's opinion § only the Lower Avonian is represented in 



* By Clee Hill is meant the mass generally called Titterstone Clee in the Midlands, though on the Ordnance 

 map and in local usage the name "Titterstone' 1 is confined to the north-western portion. The Brown Clee Hill is 

 not included in the present description. 



t The terms Upper and Lower Avonian are retained tor the present at least, though they are nearly, if not 

 (pule, synonymous with the Visean and Tournaisian of the Continent. 



J Dr A. Vaughan, Quart. Journ. Geol. Soc, vol. lxvii (J 911), pp. 367, 368, 542, 543. 



§ Quart. Journ. Geol. Soc, vol. lxi (1905), pp. 252-254. 



