WORGRET HILL AND WAREHAM WATER SUPLLY. 159 



on the second Clay or Pipe-clay-series of the Bagshots (D of the 

 column) at 166 feet below the surface * The second water was 

 first tapped in a water-logged sand at a depth of 108 feet from 

 the surface, and there is this anomaly in the situation, viz., that 

 this water is much closer to the Clay-series (B) which holds 

 down the water, than it is to the Clay-series (D) which holds it 

 up. These points will be further considered in connection with 

 the section (Fig. 2) through Worgret Hill, A-B of the plan 

 (Fig. i). It may be that the proximity of a roof of clayey beds 

 to the stratum from which the water is actually drawn, has a 

 tendency to increase the amount of fine sediment which hitherto 

 has proved to be so prejudicial to this water. 



GEOLOGICAL DETAILS OF THE BEDS PROVED IN THE 

 WELL AND BOREHOLE. 



The Plateau- gravel (x. of the column). This is generally 

 regarded as a Pleistocene formation, but is certainly one of high 

 antiquity, since it apparently antedates the formation of both the 

 valleys, viz., those of the Frome and Pydel, which flank the 

 block of Bagshots on which it rests. f It is of some importance 

 economically since the best road metal of the district is obtained 

 from these beds. Worgret is the eastern termination of a 

 continuous strip of this Plateau-gravel, which, as previously 

 mentioned, extends westwards to the neighbourhood of Gal- 

 low's Hill. The thickness of 9 feet recorded at Worgret is 

 a fair average one, though another spread of it on the south 

 side of the Frome attains a thickness of 18 feet on Ower 

 Heath. 



* The late Mr. L. "W. Pike informed Mr. Drew that throughout the area of 

 Furzebrook and Grange, where his operations for clay where carried on, he 

 invariably encountered at the same level a body of water which he believed to be 

 identical with that found in the well at Worgret. 



f See Proc. Dorset Field Club, Vol. XXIII., pp. 149, 150, article 

 " Creechbarrow." 



