356 



J. F. BLAKE AND W. H. H1JDLEST0N ON 



(fig. 16), attention to the following points will be necessary. The 

 two are approximately parallel ; the distance between them about 

 1 J mile. Their eastern terminations correspond ; but Ampleforth- 

 Beacon quarry (e of fig. 17) is due south of a point 300 yards to the 



Fig. 17. — Section from Ampleforth Beacon to Oswaldkirlc (about 2 miles). 

 w. 



675 ft. 



ac.v;vvvx##>;. 



Base-line 225 feet above sea-level. 



1. Lower Calcareous Grit. 

 2'. Passage beds. 



4. Coralline Oolite. 

 4\ Coral Rag. 



5. Upper Calcareous Grit. 

 O. C. Oxford Clay. 



e. Limestone quarry at Ampleforth Beacon. 



f. Quarry above Oswaldkirk Hagg. 



g. Quarry below Oswaldkirk Hagg. 

 h. Quarry in Oswaldkirk village. 



x-y. Ampleforth College to St. Oswald's Church. 



West of Sproxton quarry (cl of fig. 16). This fixes the relation of the 

 two sections. As regards elevation, the Coralline Oolite has risen 

 from d of fig. 16, 450 feet, to e of fig. 17, 675 feet. This is the greatest 

 elevation attained by it in any part of Yorkshire. It will be ob- 

 served that this escarpment runs nearly in the same direction as the 

 dip. The beds fall over towards the north, however, especially on 

 the reverse slope. 



The line from x to y represents the level of the road between 

 Oswaldkirk and Ampleforth projected upon the section, x being the 

 position of Ampleforth College. Starting from this point, the road 

 to within a short distance of quarry g passes over Oxford Clay, but 

 east of this point enters the Lower Calcareous Grit, all the beds 

 descending with a considerable dip to the eastwards. There are 

 several quarries in the Lower Calcareous Grit at various points in 

 the escarpment between the two villages. The stone is very un- 

 tbssiliferous, and presents few features of interest; but we have 

 altogether failed to detect the Hambleton Oolite, or Lower Lime- 

 stone, as a distinct formation. 



In a district where both faults and landslips tend to obscure and 

 mislead, it may be dangerous to calculate thicknesses from heights 

 taken upon an escarpment ; but there seems good reason to suppose 

 that the Lower Calcareous Grit is at least 100 feet thick in that 

 portion of the escarpment between e and /. It is succeeded by 

 impure gritty oolites and speckled grits, which exhibit few traces of 

 fossils in this locality. These constitute throughout this district the 



