﻿Vol. 6 1.] IN THE NOKTH-STAFEORDSB.IKE C0AL-MEASUKES. 505 



the character of the deposit as unmistakably marine. It was 

 evenly distributed throughout the shale, and the individuals were 

 fully developed and in a fine state of preservation. 



(6) Roof of the Single Two-Feet Coal or Moss Cannel. 



This horizon was discovered by me in June 1901, during the 

 sinking at Sneyd Colliery, Burslem (10 in PI. XXXIV), and since 

 then it has been widely traced in the Coalfield. Its position is 

 shown in the following sections : — 



(a) Sneyd Colliery, Burslem (No. 10, PI. XXXIV). 



Thickness in feet inches. 



Moss Coal 4 10 



Shales 20 3 



Dark shale 2 Myalina compressa. 



Shales 10 



r ,. I Lingula mytiloides. 



1 1 8 



Coal 2 



Black shale 1 



Cannel Coal 



(b) Berry-Hill Colliery (No. 12, PL XXXIV). 



Thickness in feet inches. 

 Moss Coal. 



Measures 18 



Dark shale 3 



Coal 2 



(c) Florence Colliery (No. 19, PI. XXXIV). 



Thickness in feet inches. 



Moss Coal 5 6 



Dark shales, with thin hands of ) q q 



ironstone J 



Dark shale 6 Lingula mytiloides 



Coal 2 5 [throughout. 



At No. 16 Pit, Silverdale (1 in PI. XXXIV), this horizon was 

 found immediately overlying the Single Two-Feet Coal (which 

 in this locality is about 24 feet below the Single Four-Feet Coal). 

 The significance of this discovery lies in the fact, that it has enabled 

 us to identify with certainty the Single Four-Feet Coal of the west 

 side of the anticlinal axis with the Moss Coal of the Potteries 

 area. 



The thinning-out of the measures between the Moss Coal and the 

 Moss Cannel from 31 feet 6 inches at Sneyd (10 in PI. XXXIV) 

 to 15 feet 9 inches at Florence Colliery (19 in PI. XXXIV)— 

 that is, 50 per cent, in a distance of about 5^ miles — is worthy 

 of remark. 



