222 Upper Greensand. 



Grit, then from Buckland Newton, in Dorsetshire, to 

 the neighbourhood of Shaftesbury, on Kimeridge Clay. 



Near Shaftesbury the Gault comes on in force, and 

 separates the Upper Greensand from the Oolitic rocks 

 as far as the neighbourhood of East Knoyle, on the 

 north side of the mouth of the Vale of Wardour. Be- 

 tween East Knoyle and Chapmanslade in Wiltshire, 

 the Grreensand lies chiefly on the Coral Rag, but partly 

 on the underlying Oxford Clay, and the Grault, if present 

 at all, is so thin that it cannot be mapped. It is pro- 

 bable that when the Grault was deposited elsewhere, 

 this part of the Oolitic area was above the sea-level. 

 P\om Chapmanslade, the Greensand, underlaid by 

 Grault, runs along the lower part of the Chalk escarp- 

 ment in an ENE. direction, by Westbury to Urchfont 

 and Devizes, and from thence, lying nearly flat, the strata 

 form the surface of a broad tract of country, eighteen 

 miles in length from west to east, bounded on both 

 sides by Chalk, the whole forming a low anticlinal 

 north and south curve. Still further east, at Shalbourne 

 and Sidmonton, near Kingsclere in Hampshire, two 

 other tracts of Upper Greensand rise through the Chalk 

 to the surface in anticlinal curves of an oval form. 



Between Devizes, the Fens of Cambridgeshire, and 

 the east coast of the Wash, the Upper Greensand runs 

 to the north-east, in a long somewhat sinuous line, and 

 nearly all along the strike it forms the lower part of 

 the bold escarpment of the Chalk, which overlooks the 

 great plain or table-land of Oolitic strata that runs 

 across England from the coast of Dorsetshire to the 

 Humber. North of the Humber, it is marked in 

 ordinary maps as skirting the Chalk Wolds, first to the 

 north and then to the east, as far as Filey Bay, but if 

 such be the case, its sandy character is not always 



