128 PROCEEDINGS O'F THE GEOLOGIGAL SOCIETY. [DeC. 7, 



the water-run of the country, than to the mere presence of the 

 rock which forms the original matrix, at least in those cases where 

 the segregation of the quartz, &c. has assumed the foliated form, 

 and where the gold, therefore, has not been concentrated in well- 

 defined reefs or lodes. 



Synopsis of the Geological Formations in Otago Province. 

 (The italic letters refer to the section on p. 125.) 



I. Eecent (a ?). 



1. Alluvial. Kiver-silts, shingles, and deltas. 



2. Lacustrine. Exposed by the gradual drainage of lakes. 



3. Estiiarine or Littoral. Exposed by emergence of coast- 



line. 

 II. Pleistocene. (Newer gold-drifts.) 



1. Lacustrine. In basins in the interior. 



2. Glacial. Moraine-deposits and loess. 



III. Pliocene ? (e^). (Great gold-drift.) 



1. Sand, &c. in basins in the interior (with lignite). 



2. Coastward deposits. 



a. Yolcanic and tufaceous deposits. 

 (3. Sands and clays. 



IV. Miocene ? 



1. Oamaru or calcareo-arenaeeous series* (6). 



2. Moeraki or argillaceous series (with brown-coal) (c). 



3. Waitaki. Arenaceous. 



V. Carbonaceous series (e &/). Estuarine strata, with conglo- 

 merates, sandstones, shales, and brown-coal of fine 

 quality. 

 VI. Te Anau series (g). Porphyritic conglomerate, wacke, clay- 

 stones, glossy slates and diabase, and porcellanite, 

 VII. Kahiku series (h ?). Quartz, clay-shales, sandstone, diorite- 

 slate, black cross-cleaved slate, siliceous and true clay- 

 slate. 

 VIII. EoKated schists. 



1. Grey argillaceous. Kakanui series (^). 



2. Blue clay-slate. Micaceous or chloritic (i'). 



3. Contorted felspathic schist (i"). 



All these are more or less impregnated with infil- 

 trated quartz, and are auriferous. 

 IX. Gneiss-granite (k). Quartzose with garnets, or Felspathic. 



* Apparently the same as the " White Crag," or " Ototara Limestone" of 

 ManteU. See Quart. Jom*n. Geol. See. vol. vi. p. 328. — Edit, 



