WORGRET HILL ANt> WAREHAM WATER SUPPLY. 169 



reviewing all the facts of the case, one might say that in a 

 borehole starting from the Worgret plateau the Chalk should 

 be reached at a depth of from 400 to 450 feet from the surface. 



STRUCTURE OF WORGRET HILL. 



Having dealt with the history of the Well and the questions 

 more directly arising in connection with it, there yet remain a 

 few points of interest as regards the structure of Worgret Hill 

 and the possibility of correlating the beds of the well and 

 borehole section with their equivalents on the outcrop. Those 

 who know the Bagshot Beds will agree that this is by no means 

 an easy task, and the results are not altogether satisfactory. In 

 this connection the reader should consult the plan and section 

 of Worgret Hill (Figs, i and 2), and particularly the folding 

 plate (Fig. 5), where the well and borehole section is contrasted 

 with the outcrops at several points on the south-west slope of the 

 hill itself. 



Towards the end of October, 1905, in conjunction with 

 Mr. Bloomfield, I spent some time in making a traverse from 

 the "Gravel Pit" (see Plan, Fig. i), to the well-mouth, the 

 direction being from S.W. to N.E. This traverse is on the 

 plateau slightly above the 100 feet contour, and crosses the 

 Heath road, the distance being about 700 feet. There is a faint 

 cart track leading from the Dorchester high road to that pit. 

 To my surprise, I found the Plateau-gravel here mixed with 

 masses of Bagshot Clays, and we proved on the spot that the 

 gravel rests here on an outcrop of Bagshot Clay of the " blood- 

 shot" or variegated character. From this gravel pit to a point 

 on the Heath road where the south-west arm of the earthworks 

 terminates is about 300 feet, the area being flat or slightly rising 

 towards the N.E. The whole of this space is seamed with old 

 workings in Plateau-gravel resting on clay, and it is clear that 

 there is an important outcrop of clay hereabouts, thus occupying 

 the summit of the plateau for a space. The outcrop of this clay 

 on the above traverse lies mainly just above the ico feet contour, 



