FOSSILS FROM THE UPPER GREENSAND. 97 



it formed part of the very topmost bed of the Upper Greensand 

 along a strip of country which is about twelve miles in length. It 

 sets in near Okeford Fitzpaine, which is not far from Sturminster 

 Newton, and is traceable as far westward as Dogbury Hill, north of 

 Mint erne. 



If my readers will refer to the map of the Geological Survey 

 (sheet 18), or even to the small map accompanying my paper in 

 Vol. XVI. of the Proc. Dorset Nat. Hist, and Antiq. F. Club, they 

 will see that the line of junction between the Chalk and the Upper 

 Greensand runs through Ibberton, Woolland, and Stoke Wake, 

 curving southward to Melcombe Bingham and thence westward 

 along the hills south of Armswell Farm to Bookham, Buckland 

 Newton, and Minterne. 



Along this line of country there are many small quarries and 

 road-cuttings in which the rock is exposed and as this is a hard 

 glauconitic sandstone of a decided green colour it is easily recognis- 

 able. Its conspicuous characters and the fact that it contains 

 numerous fossils in a good state of preservation appear to have 

 attracted the attention of local observers and as a consequence we 

 are fortunately in possession of a good collection of its organic 

 contents. 



Anyone walking along the foot of the chalk escarpment from 

 the valley of the Stour will find the first trace of the bed in a sand 

 pit by the roadside about half-a-mile south of Okeford. The section 

 here is as follows : 



Feet. 

 Soft glauconitic marl (base of chalk) ... ... 1 



Dark glauconitic sand with many fossils, containing 

 in the upper part many concretionary lumps of 

 hard calcareous sandstone ... ... ... 2 



Dark green sand with irregular concretions of rough 

 glauconitic sandstone passing down into green 

 sand without concretions ... ... ... 27 



