Murchison's Silurian System. 2i 1 



from Lindley hills to the narrow promontory of Lyth hill, 

 round which the coal measure is folded, and forms an irre- 

 gular base; and hence the coal which occurs at one spot 

 in consequence of the older rocks lying at certain depths, 

 is cut out at other points by the protrusion of these ancient 

 formations. The upper coal is the only seam which has 

 been found near Shrewsbury, most of the old works having 

 effected little more than the clearing away of the basset 

 edges of the mineral as it rises on the sides of the under- 

 lying Cambrian rock. " Mr. Hughes however has made, and 

 is still making, trials upon the dip of these beds, by which the 

 coal has recently been won beneath the lower new red sand- 

 stone. Though the shaft sections vary considerably in dif- 

 ferent parts of this tract, the following may be taken as 

 one of the fullest exhibitions of the measures sunk through 

 at Wellbatch. 



Yds. feet, inches. 



Portions f Reddish clay, .., 300 



of Lower -^Sandstone of dull brownish red colour, . . 3 



NewRed - CRed and green shale with fragments of plants, 20 



Top rock (grey sandstone,) 3 



Curdled poundstone (a mixture of sand, clay, 



containing plants), 5 



Kind cold (shale), ......... 400 



Coal, 9 



Poundstone, 10 



Kind cold, 500 



Coal, 1 



Curdled poundstone, 10 



Four yard rock, a greenish white hard sand- 

 stone, 400 



Light coloured poundstone, 10 



Cold, , 400 



Coal, 001 



Poundstone, . • , 100 



Cold, 700 



Coal, the uppermost seam of the other sec- 

 tions, 018 



Total, ... 62 2 7 

 2 F 



