43 



Miocene ? (Estuarine and Lacustrine). 



25. Very find grey sand ... ... ... ... 34 



26. Very fine grey sand with carbonaceous debris, con- 



taining water-worn pebbles and rolled fragments 

 of shell of species occurring in No. 24 ... ... 12 



27. Lignite mixed with fine mud ... ... ... 2 



28. AYhite pipe-clay with lignite fragments and nests of 



iron pyrites ... ... ... ... 14 



29. Brown argillaceous earth mixed with carbonaceous 



matter and nests of iron pyrites ... ... 13 



30. "White pipe clay with lignite ... ... ... 9 



31. Fine sand. Water ... ... ... ... 3 



32. Kaolin clay, mixed with sand in the upper part, and 



sharp quartz grit in the lower ... ... 55 



Pre-Silijeian. 



33. Decomposing felspathic quartzite 



34. Decomposed slaty rock, quartz vein ) 



35. Decomposed felspathic rock, quartz vein j 



36. Felspathose-quartzite gritstone ... 



37. Thinly bedded fine-grained sandstone with talcose- 



slate partings 



Summary. 

 Recent surface accumulations 

 Pliocene loams, gravels, and clays. 

 Marine Miocene 

 Lacustrine Miocene 

 Pre-Silurian 



Total ... ... ... 411 feet. 



"Water was tapped in stratum No. 12 ; it was very salt, and 

 rose to a height of 43 feet in the borehole. 



Bed No. 12 I have regarded as the basal member of the 

 Newer Tertiary series, because of its angular gravel, and that 

 the underlying clayey sands, though unfossiliferous, insensibly 

 graduate into others of undoubted Miocene age. 



A fair supply water was also obtained in Bed No. 31, it 

 yielded 117.4 grains of solid matter to the gallon. To the 

 taste it was sweetish and slightly saline. 



The chief ingredients determined were : — 



CaCOa 5-2, MgCOj 1.3, NaCl, &c., 1109. 



