WORGRET HILL AND WAREHAM WATER SUPPLY. 1)1 



clay marked^ on the Plan (Fig. i) can only be located hypo- 

 thetically, but there is no doubt it is the same clay series as that 

 in the Well, and also on the outcrop along the Heath road. 

 Inferentially, the intermediate region is occupied by the Higher 

 Sand (A.), but the tract known as Worgret Heath affords little or 

 no opportunity for accurate investigation. 



One of the puzzling features of what I may term the Worgret 

 problem lies in the fact that the Higher Clay series (B.) seems 

 suddenly to diminish on the outcrop a little to the eastward of 

 the line A-B. The whole of the eastern end of Worgret Hill is 

 a sandy region, due to the extensive development and outcrop of 

 the Higher Sand (A.). When we begin to feel for the under- 

 lying Clay-series (B.) on the south-west slope of Worgret Hill 

 (see Fig. 5), the only indication of the great Clay-series of the 

 Well appears at the top of borehole No. 2, where two character- 

 istic Bagshot Clays, each about 4 feet thick, enclose about 

 9 feet of variable sands, mostly coarse, the whole series 

 measuring 17 ft. 3111. 



This is all we can find in this direction to represent the 54 feet 

 of the Clay-series in the Well. The sands enclosed between these 

 two clays are wet and there are indications of moisture such as 

 the growth of rushes close to the mouth of the second borehole, 

 about the 70 feet contour. If we accept this group of beds, with 

 a thickness of lyft. 3in., as the representative of the Higher Clay, 

 its base is 54 feet above O.D., whilst the base in the well section 

 of the Clay-series is 2ft. bins, below O.D., the horizontal distance 

 being 1,450 feet. These figures show an approximate dip of zj 

 degrees towards the N.N.E. It is significant that the sands 

 between the two clays in No. 2 Borehole are wet, and it is 

 thought by some that this moisture may indicate the source of 

 the very copious water supply which was first struck at 108 feet 

 from the surface in the well section. 



Apart from considerations as to such a limited source for so 

 large a supply, it seems probable that the water-line of the Frome 

 valley, acting on the permeable beds of the Second Sand-series 

 (C. of the Tabular column), produces saturation especially in the 



