i84 



NOTES ON SECTIONS IN GRAVELS NEAR DONCASTER. 



GEO. GRACE, B.Sc. 



Over the district to the east of Doncaster are scattered large 

 patches of gravel. They generally rest on the Bunter Sand- 

 stone, and have been mapped by the Geological Survey as of the 

 same period, but there seems room for doubt as to whether they 

 may not be much later. They consist of beds of sand alternating 

 with layers of well rounded pebbles of vein quartz, quartzite, 



Section in Gravels at Armthorpe. 



sandstone, ironstone, and cherts of various colours. The last 

 three are most probably of Carboniferous origin, but the former 

 two, which are the most numerous, are of unknown age. They 

 are strikingly current-bedded, and the directions from which the 

 streams which have arranged them appear to have come vary 

 very much. A fuller account of them has been given by Mr. 

 H. H. Corbett in a previous volume of the ' Naturalist.'* 



During the construction of the new South Yorkshire Railway, 

 a cutting has been made through one of these gravel heaps near 



Glacial Geology of the Neig-hbourhood of Doncaster, Feb. 1903, pp. 



47-5°- 



Naturalist, 



