Howarth : The Ice-home Botilders of Yorkshire. 179 



TABLE CC. 



Reported by Mr. J. \V. Stather. 



North Ferriby. 



In the boulder clay cliff on the Humber shore near North 

 Ferriby, and on the adjacent beach, 373 boulders noted of 8 in. 

 and upwards in diameter, the classification of which yields the 

 following" result : — 



Per cent. 



69 Carboniferous limestones ... ... ... ... ... 18*5 



104 Sandstones, g"rits, conglomerate, etc. (probably nearly all 



from Carboniferous or palaeozoic rocks) ... ... 27*9 



49 Sandstones etc., probably nearly all of Mesozoic Ag-e ... 13*1 

 2 1 Lias ... ... ... ... ... ... ... ... 5 '9 



10 Chalk (including 4 black flints) ... ... ... ... 2'6 



88 Basaltic and other eruptive rocks ... ... ... ... 23*5 



32 Granites, schist, gneiss, etc. ... ... ... ... ... 8-5 



373 loo-o 

 TABLE DD. 



Reported by Mr. Paul Davis and INIr. J. W. Stather. 

 Redcar and Saltburn. 



In the boulder clay cliffs between Redcar and Saltburn (four 

 miles) 133 boulders, a foot and upwards in diameter, were ob- 

 served. The classification of these boulders yields the following 

 results : — 



Per cent. 



50 Carboniferous limestones ... ... ... ... ... 37*6 



28 Sandstones and grits of undoubtedly Carboniferous age 21*1 

 12 Sandstones, origin doubtful, but probably in part Carboni- 

 ferous ... ... ... ... ... ... ... 9"o 



7 Magnesian limestone ... ... ... ... ... ... 5-3 



15 Lias 11-3 



21 Basaltic rocks ... ... ... ... ... ... , ... i5'8 



133 loo-o 



MR. J. W. STATHER, F.G.S., AND RELATIVE DISTRIBUTION. 

 ' The following table, showing the boulders of two selected 

 localities in the southern part of the Yorkshire Coast and 

 two in the northern part, will serve to illustrate the general 

 distribution : — 





Dimling- 

 ton. 



North 

 Ferriby. 



Whitby. 



Sahburn. 



1. Carboniferous sandstones 



and limestones... 



2. Basalt (whin-sill) ... 



3. Magnesian limestone .. 



4. Granite, gneiss, etc. 



Per cent. 



55 



32 



13 



Per cent. 



59 

 30 



1 1 



Per cent. 

 24 



5 - 



Per cent. 



73 

 20 



7 

 0 



100 



100 



100 



100 



1908 May I. 



