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locality is about three miles north-east of Yorketown. The 

 stone is not so coarse in the grain as many of the erratics of 

 the district, and was probably derived from a grey colored 

 granite, as the evidence of this still remains, although the 

 block, as a whole, is now of a deep red color from penetrat- 

 ing iron stains. The mica constituent is Biotite. 



(g) Well-Sinking at Yorketown. — Sinking for water has been 

 extensively tried throughout the district with varying suc- 

 cess. All such sinkings have been in stiff clay, and I have 

 learnt by enquiries that the occurrence of isolated stones in 

 the clay is a common thing. Mr. Matthews, of Yorketown, 

 has kindly placed in my hands a fragment of a granite boul- 

 der that was met with in sinking a well at Yorketown. 

 It was found at a depth of 60 ft. from the surface, and has 

 a distinctly polished face on one side. In no instance, so 

 far as I could ascertain, was the clay bed penetrated to the 

 bed rock in these sinkings. 



ill) Government Bore in Tocchi's Lagoon. — In 1890 the Go- 

 vernment put down a trial bore at the northern end of 

 "Tocchi's Lagoon, situated in Section No. 291, Hundred of 

 Melville, about a mile east of Yorketown. Through the 

 courtesy of Mr. J. W. Jones, Conservator of Water, I am 

 enabled to give the following particulars of the strata passed 

 through in the bore : — 



ft. in. 



Black mud 



Dark clay with gypsum 



Dark clay 



Hard sandstone 



Sandy clay 



Very hard blue rock ... 



Bore stopped at ... ... ... ... 305 5 



The above sinking was evidently in the boulder clay of the 

 district, and shows a local deveVpnu nt of, at least, something 

 over 300 ft. Work was slopped on meeting a hard rock, 

 which was penetrated to the extent of eleven inches. The 

 occurrence of a hard rock in such a formation could not be 

 taken as definite proof that the base of the clay bed had 

 been reached. It is extremely probable that the point at 

 which the bore was stopped was not bed rock, but an included 

 erratic that had come in line with the sinking and given the 

 false impression that bottom had been touched. The section 

 is, however, an extremely interesting one, and supplies evi- 

 dence of the great thickness of glaei;u deposits that occur over 

 the southern portions of the peninsula. 



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