﻿Vol. 6 1.] IN THE NORTH-STAFFORDSHIRE COAL-MEASURES. 



(b) Sneyd Colliery (No. 10, PL XXXIV). 



Thickness in feet inches. 



Dark-grey shale (Marine bed.) 



Eider Coal 4 



Shales 23 9 



Eider Coal 2 2 



Dirt-band 5 



Coal 2 



Shales and rock-binds 34 2 



Eider Coal 3 2 



Shales, with thin bands of sand- 1 kq . p 



stone J 



Seven-Feet Banbury Coal. 



507 



(c) Norton Colliery (No. 8, PI. XXXIV). 



Thickness in feet inches. 



( The upper G feet of 

 Dark-grey shales with nodules ... 21 <^ these shales contain 



Coal • 8 ' the marine fossils. 



Shales and rock-binds 19 9 



Coal 2 3 



Shales and rock-binds 15 9 



Coal 2 



Compact argillaceous rock 108 



Seven-Feet Banbury Coal. 



(d) Leycett Colliery (No. 2, PI. XXXIV). 



Thickness in feet inches. 



Shales, with, large bullions 7 (Marine horizon.) 



Dark shales 8 



Third Eider Coal 9 , BeyncMa arcuata in 



second eideVcoal"'::::::::::::::; i d ^ the uppers™. 



Shale 1 



First Eider Coal 2 



Shale 10 



Seven-Feet Banbury Coal 5 6 



Fireclay. 



At Hayes-Wood Pit (3 in PI. XXXIY) the marine horizon is 

 only about 15 feet above the Seven-Feet Banbury Coal. 



On the west side of the Coalfield the fossiliferous ' bullions ' are 

 bigger, more abundant, and more geometrically shaped than on the 

 east side ; the specific gravity of these bullions ranges from 2*67 to 

 2-75. 



The foregoing sections show abnormal thickening of the measures 

 between the Seven-Feet Banbury Coal and the marine bed in the 

 northern and eastern portion of the Pottery Coalfield. 



Again, nothing is more remarkable than the erratic changes in 

 the nature of the roof of this coal, which is ' rock ' or fine sandstone 

 at one place, and a soft laminated shale at another. A comparison 



