169 
SECTION No. 6—Continued 
c Section of the Coal Measures of the Forest of Dean 
Taken from the Memoirs of the Geological Survey, 1856, Vol. I. 
Thickness | Distance Total 
Description of Measures 3B Eee Between depth to 
- inches | coal seam tto 
fain pectin. ch. <n. 
139—Sandstone ... a8 wae tee cea AZ* (0 TA 0 | 2271 7 
140—Coal (Lower Trenchard) .. ase se 1 4 
141—Under-clay ... ie Se E> bey 2 0 
142— Hard pa a pan Bom ates eae. 0 
143—Red marl ... aan os se nee 1 6 
144—Red sandstone te ess es teh OOR IO 
145—Marl.. bas oh nee 1 6 
146—Hard gray sandstone me eb ...| 30 0 
147—Soft sandstone ie ee as se) 39 0 
148—Sandstone ... wae kg — fc 7 0 
149-—Marl ... a Hee a ne ied 1 6 
150—Sandstone ... Ae ae oe Becl) yll! 0 
151—Marl .. = eee eee Ties: 
152—Gray and white sandstone ar | 54 0 
153—Marl and sandstone fas in bee 116 
154—Sandstone ... zis ee ore von 9 ASO 
» 255—Marl.. a we Bs is wee 1 6 
; 156--Sendstone 20 
= 157—Marl ... aaa oe wen 0 6 
— -158—Light gray s sandstone 5p we oe 8 0 
~ 159—Marl. net ioe aos in es 
160 —Sandstone Site es ocal. eo 0) 
_ 161—Gray and red i impure limestone ... : 8 0] 277 0 |2548 7 
(SEE OVER) 
