J. R. Dakyns — Millstone Grit of Grassington. 



223 



however) are given to the nearest foot from the record of a well 

 recently made (1902) just over one mile away to the east. 



In conclusion, it may be pointed out that, beyond the direct 

 object of the paper, several little points in local geology have been 

 cleared up or made more intelligible. Perhaps the most generally 

 useful result is the demonstration that a levelling up process was 

 going on just before the commencement of the Lower Liassic 

 period, which culminated in the Ehastic beds (White Lias), and 

 that a similar levelling took place at the close of the Middle Lias 

 period, though this was perhaps as much a result of redistribution 

 of material in shallow water, a give and take process, which 

 ultimately led to the very uniform conditions of the ' Acutus ' zone 

 (Transition bed) at the top of the rock-bed of the Middle Lias. 



VII. — Note on the Millstone Grits of Grassington Moor. 

 By J. R. Dakyns. 



THE Millstone Grits of Grassington consist, speaking generally, of 

 the beds given in the following table, viz. : — 



Grit of Henstone Band. 



Measiu-es. 



Thin limestone. 



Redscar Grit. 



Measures. 



Sandstone. 



Measures. 



Sandstone of Priest Tarn. 



Measures. 



Coal and shale. 



Top Grit of Grassington Moor. 



Shale and coal. 



Bearing Grit of Grassington Moor. 



As throughout the greater part of Upper Wharfedale the Bearing 

 Grit lies immediately on or close to the Main Limestone of Phillips' 



