362 Yorkshire Boulder Committee : Fourteenth Year's Work. 



Thirley, near Cloughton. 



Great gravel-mounds here are strewn with large blocks all of 

 Jurassic sandstone, in numbers greatly exceeding what may be 

 seen elsewhere in Yorkshire. 



Whitby, cliffs to west of town. 



A bed of gravel lying between two beds of boulder clay, the 

 lower dark grey in colour, the upper reddish, contains the fol- 

 lowing rocks roughly in order of prevalence : — 



Jurassic and other sandstones, magnesian limestone, car- 

 boniferous limestone, basalt, conglomerate (? sparagmite), 

 greywacke sandstone (or ? sparagmite), jasper, alum shale (a 

 large block), Gryphcea incurva, ball of red boulder clay. 



Wheatcroft, near Scarborough. In corner of second field 

 from road. 

 One Shap granite, 2 ft. long. 



Seamer. 



The gravels between Seamer quarries and Waydale House 

 contain a very high proportion of basalts. 



Seamer Beacon. 



The tower here is built of rough blocks, mainly of Jurassic 

 sandstone ; but with large numbers of basalt or dolerite, and 

 some Cheviot porphyrite. 



Yedmandale. 



A pit shows gravel consisting of local stones with many 

 Cheviot porphyrites, some greywacke, jasper, and a few granite 

 pebbles. Fragmentary marine shells are also found. 



Hutton Bushell. In gravel pit on 200 ft. contour. 



Many local stones with Cheviot porphyrites, magnesian lime- 

 stone (Roker type), Kimmeridge clay, gneiss, granite. 



Reported by J. A. Jordan, of Doncaster. 



Gainsborough, Lincolnshire. 1 On Spital Hill. 



One large block of Shap granite, the light variety. 

 One block of ' greenstone ' (probably dolerite). 



Reported by Wm. Simpson, F.G.S., and Robert Law, F..G.S. 



Mytholmroyd. Raised terrace on south bank of river Calder. 

 bounded on the west by Stubbs Clough and on the east by 



1 The Committee propose to record boulders outside the county which 

 are intimately associated with and may serve to illustrate the dispersion of 

 erratics in Yorkshire. 



Naturalist. 



