256 ME. R. H. GOODE ON THE FOSSIL FLORA OF [June 1913, 



(quarter-inch scale, Sheet 13 & part of 17), in connexion with the 

 recent survey, was published in 1910 ; and maps on the 1-inch 

 scale (New Series, Sheets 227, 228, & 245), and on the 6-inch 

 scale, are now being prepared for publication. 



In the following table are enumerated the coal-seams that occur 

 in the jSTolton and Newgale Measures. They are arranged in the 

 order of sequence, and are taken from the section which has been 

 constructed for this district by Mr. H. H. Thomas, to whom I am 

 indebted for permission to make use of it. 



It has been thought, partly owing to the thickness of the Coal 

 Measures in this region, that the higher beds may possibly be 

 equivalent to the Pennant Grit of the main South Wales Coalfield, 

 as was first suggested by De La Beche. 1 In that case the coal-seams 

 that occur above those that have been definitely placed in the Lower 

 Coal Series, as seen in the section, would be included in the Pennant 

 Grit. In these beds the prevailing strata are sandstones with, 

 however, some shales and mudstones. In the Lower Coal Series 

 there are three series of sandstones : namely, between the break 

 which is a little below the Polkeston Yein and the Quarry Vein ; 

 also on the horizon of the Brawdy Coals ; and, lastly, between the 

 lowest ' Thin Coal ' and the Olive Shales which lie at the base of 

 the Lower Coal Series. The greatest thickness of shales and mud- 

 stones occurs between the Quarry Vein and the break which is 

 a little above the Brawdy Coals, but they also occur interspersed 

 among the sandstones. 



Approximate distance in feet 

 from the base of the Coal Measures. 



Rickets Head Vein 6580 



Black Cliff Vein 6360 



Cliff Vein 6050 



Hookes Vein. 



Folly Vein 5070 



I Thin Coal. 



J Folkeston Vein. 



Bi-eak unknown 4235 



I Haggard Vein. 



| | Oxland Vein 3500 



a j Stonepit Vein. 

 qq | Quarry Vein. 

 ~ J Foot Vein. 



5 1 Yard Vein ] 2640 



Stink Vein Simpson Coals. 



Five-Foot Vein f l 



Three-Quarter Vein J 2430 



, Four Thin Coals. 



Break unknown 1665 



i Brawdy Coals. 

 [ Thin Coal. 



(Farewell Rock) 



1 De La Beche (1846) p. 159. 



'-> 



