36 baker's north YORKSHIRE. 



which runs east and west and from which they dip towards the 

 north and south. Where the beds of this series sink beneath 

 the tabular hills of the Middle Oolite, these latter rise above 

 them in a conspicuous escarpment, so that the line from 

 Hambleton End to Scarborough, which marks the disappearance 

 of this series from the upper levels, is easily traceable. On the 

 western flank of the moorlands opposite Thirsk we have upwards 

 ol 200 feet of Middle Oolite on the surface, and upwards of 600 

 feet of the Lower Oolite shewn beneath it as under, the surface 

 of the series being about 850 feet above the sea level. Accord- 

 ing to Prof. Phillips the greater part is here marine. It may be 

 divided as follows : — 



5. A trace of the Cornbrash. 



4. The Upper Sandstone and Shale beds, 250 feet in thick- 

 ness, with ironstone and carbonaceous bands. 



3. Calcareous, oolitic and shaly beds, 30 feet thick, with 

 irony bands (equivalent to the ' Scarborough Limestone '). 



2. The Lower Sandstone and Shale beds, 320 feet thick, with 

 ironstones, one 3 feet bed and several bands ; also with bands ot 

 cement nodules, and a coal seam (equivalent to Middle and 

 Lower Estuarines). 



I. Calcareous, shelly, partly oolitic ironstone, 7 to 12 feet 

 thick, 20,000 tons to the acre, over it in some places shale with 

 a band of ironstone nodules (the Dogger beds, with Am. 

 murchisonce). 



In Phillips' Geology of Yorkshire, 1875 edition, he gives the 

 following section, p. 30 : — 



Cornbrash above. 

 152 feet, Sandstone with shale. 



Gjh ,, ,, resting on some 30 feet ot calcareous and ironstone 



beds. 

 ; coal or dark shale at middle ; calcareous at base. 

 , shale, &c., including 3 feet calcareous masses and 



ironstone. 

 , surmounted by I foot calcareous. 

 Dogger beds, rich in iron, A»i. miirchiso7i(E. 



