internal Structure of the Magnesian Limestone. \ \ \ 



4. Reddle (earthy red oxyd of iron), texture fissile 5 



5. Red and yellow clay 2 o 



6. Reddle 4 



7. Red and yellow clay 2 



8. Reddle 9 



9. A thick irregular bed. Highest part, blue clay ; middle part, blue clay,") 



alternating with gritstone bind ; lower part, strong blue slate clay. )» 40 

 Thickness about j 



10. Coal, impure and pyritous 1 5 



11. Fire clay, used in the potteries, followed by the regular Yorkshire coal.l — 



measures j 



In this section there is no trace of the marl-slate. The beds from No. 4. to No. 8. inclusive 

 (and perhaps also the upper part of No. 9.), represent the inferior red sandstone. On the south- 

 west side of the hill, these beds are replaced by a coarse and micaceous sandstone, exhibiting 

 many irregular lines of cleavage not parallel to the planes of stratification. 



No. 2. — Section, in descending order^ derived from the great cut for the road 

 at Wentbridge Hill, 



Feet. Inches. 



1. Under the soil, a mass of earthy, rubbly, yellow limestone 2 



2. Six beds of soft, coarse, cellular, yellow limestone 12 



3. Cellular beds, each about one foot thick, yellowish grey, hard and splintery 6 



4. A coarse, irregular bed, with many casts of shells 3 o 



5. Coarse, soft, cellular bed 2 



6. Various thin, cellular beds, hard and porcellaneous, with a few casts of 1 



fossil shells / -^ *' 



7. Yellow sand 3 



8. Irregular bed of soft sandstone ; brown, with bands of purple and yellow. 5 



9. Violet-coloured slate-clay, thinning off in both directions 3 



10. Soft, micaceous, reddish brown sandstone, with subordinate lenticular! 



masses of slate-clay and concretions of oxyd of iron j 



11. Micaceous, sandy, slate-clay of various colours, purple, blue, brown, and"] 



red, containing some bands of yellow sandstone ; also of grey sand. )> 30 

 stone, with particles of green earth J 



All the beds below No. 6. form a part of the lower red sandstone, the whole thickness of 



which is not exposed. 



No. 3. — Section from a denudation on Bramham Moor*. 



Feet. Inches. 



1. Under the soil four beds of hard, yellow, cellular limestone 4 



2. Magnesian conglomerate, containing pebbles of grit, with a magnesian 1 ^ ^ 



cement / 



3. Yellow magnesian marl ^ 4 



4. Semlindurated sand, separated into tabular masses not parallel to the 1 3 ^, 



strata J 



5. Coarse, grey sandstone, with white quartz pebbles 8 



6. Micaceous, slaty sandstone, with false bedding like No. 4 3 



7. Coarse sandstone^ lower part not exposed 8 



* See p. 73. 



