65 



On Tw'o Deep-Level Deposits of Newer 

 Pleistocene in South Australia. 



By Professor Ralph Tate. 



[Read June 7, 1898.] 



The majority, if not all, of the low-level tracts fringing our 

 coastline is generally known to be occupied by recent marine 

 accumulations, indicating an elevation of about 12 to 14 ft. 

 around St. Vincent's Gulf, and thence westward to Fowler's Bay 

 (see Trans. R. Soc, S. Aust., II, 1879, pp. Ixvii-lxix and 114; IV, 

 1881, p. 45; and XIII, 1890, pp. 172 and 181). In the South- 

 East, stretching from Lake Alexandrina to the plateau of the 

 Mount Gambler limestone, similar deposits of recent marine shells 

 underlay this extensiv^e paludinal area (see Woods, " Geol. Obs.," 

 pp. 183 et seq.). 



With the exception of the Port Creek shell-limestone (see 

 Trans. Roy. Soc, S. Aust., X, 1888, p. 31), which extends from 

 18 to 26 ft. below high tidemark, no tangible evidences of deep- 

 seated deposits of a like nature have been brought to scientific 

 notice, though a passing reference to such an occurrence in the 

 Tintinara bore was made at my instigation by Mr. E. V. 

 Clark (Trans. Roy. Soc, S. Australia, XX, p. 115). 

 The desirability of publishing particulars of the indications of 

 recent marine deposits at considerable depths in the Port Pirie 

 bore has influenced me in furnishing the data which fix a like age 

 for the chief fossiliferous beds passed through ii> the Tintinara 

 bore, though more than a decade has passed since the completion 

 of that work, more especially so as my analyses extend the depth 

 of the newer deposits for a further depth of 90 ft. than that 

 stated by Mr. Clark. 



TINTINARA BORE. 



This bore was executed by our Department of Water Supply. 

 Samples of the beds passed through and explanatory manuscript 

 formed part of an exhibit staged by the Hydraulic Department 

 in the Jubilee Exhibition held at Adelaide in 1887. This exhibit 

 is now in the museum of our School of Mines, and the samples 

 from Tintinara have been critically examined by me. 



