IN THE PLEASLEY AND TEVERSALL COLLIERIES. 



433 



slightly 

 of the ' 



sandstone, the lines of stratifi- 

 cation being horizontal, but 

 inclining at the edges 

 ' Wash •' to the top of 

 the coal-seam, as shown hy the 

 lines in the Section Ko. 1. 

 The ordinary surface of the 

 clay floor of the mine is smooth 

 and level ; but in crossing the 

 " Wash " tliis floor becomes 

 uneven, presenting a series of 

 furrows and ridges, the general 

 line of these being at right 

 angles to the course of the 

 " Wash." The ironstone balls 

 are exposed and stand, in many 

 places, from 2 to 3 inches 

 above the clay, their surfaces 

 being rounded and apparently 

 worn. In many places the 

 floor is finely streaked or stri- 

 ated, the striae running gene- 

 rally parallel to the course of 

 The whole pre- 

 appea ranee of 

 subject to the 

 action of a strong current. 



JSection No. 2 (fig. 3). — In 

 this section the " Wash " has 

 divided into two branches, the 

 width of the northern branch 

 being 40 yards, and that of the 

 soufhern 50 yards ; the two 

 being separated by about 46 

 yarris of coal, 9 feet thick. 

 Several layers of sandstone run 

 from the north " Wash " into 

 the sides of the coal-seam for 

 from 10 to 15 yards, these 

 layers turning soft and friable 

 as they leave the " Wash." 

 In this section the thick coal 

 is found almost entirely be- 

 tween the two " Washes," there 

 being also a marked difference 

 in the stratification of th<"' 

 sandstone in the two branches, 

 that of the north branch being 

 horizontal, as in Section 1. 

 whilst that of the south bears 



the " Wash." 

 seiits every 

 having been 



Cfq' 



-^:?^^r-.v7, 



?2 ^ "- 



