Coal Series of Yorkshire. 351 



Yds. Ft. In. 



Coal (the hard band coal) worked 2 



Seatstone 



1 



Seat earth (white clay), with vegetable fossils ... 200 



Gray shale 5 



Black shale ^ ^ ^ 



Coal (middle band coal) 10 



Middle band stone 1 1 ^ 



Black shale 8 



Layer of fresh-water shells ([7n?o) 1 



Black shale 3 1 



Ironstone ® ^ ^ 



Black shale ^ ^ ^ 



Coal (the soft bed coal) workable 1 5 



Upper millstone grit, on which Halifax stands. 



The following section of Horsforth Colliery was communi- 

 cated to me by^my most valued and lamented friend the late 

 E. S. George, Esq., of Leeds, whose researches into the minuter 

 history of The Yorkshire coal strata were equally accurate and 

 well directed ; and I hope that some of their results will soon 

 be brought before the pubhc. Yds. Ft. In. 



Clay 2 



Galliard of Headingley Moor 02 6 



Galliard in thin beds 2 1 6 



Coal (sometimes thickened by stone coal) .... 004 



Sandstone with partings 4 



Blue-brown rag 



4. 



Liftsorbedsof sandstone, about 14 inches thick,! g o 



with 2-inch partings of shale J 



Blue shale ^ 



Sandstone ^ 



Blue shale •. 1^ ^ ^ 



Blue shale, with Ammonites Ltsteri 3 



Blue shale, with Pecten papyraceus 10 



Coal •. 1 * 



Seat of coal (White Earth) ;•••' 20 



Measures ofstoneandshale,with a seam of u-onstone 8 



Coal 10 



Various measures occur below to the thickness of 20 or 30 

 yards, and then the millstone grit of Bramley appears. 



In these sections, we may observe, besides the very re- 

 markable layers of marine shells, several occurrences of a 

 peculiar hard siliceous sandstone, called Galliards, Ganister, 

 Seatstone (according to local custom, or slight diiferences), 



or 



