Uttlet. — Geology of the i^eighhourhood of Kakanui. 25 



Professor Park in his fig. 3 (p. 509) shows this beach outcrop (bed 3). 

 Now, it has been shown above (see fig. 2) that this outcrop of limestone is 

 continuous along the coast, and covered by greensand (5) as far as a point 

 directly east of Trig. T ; and Professor Park evidently interprets the coastal 

 section in the same way, for he shows 3 and 5 in their proper position. How, 

 then, can bed 7 (Waitaki stone) be at a different horizon from bed 3 (Oamaru 

 stone), as his section (fig. 4) shows ? Palaeontological evidence is not wanting 

 to support the contention that there is but one limestone horizon, for in the 

 road-cutting near the farmhouse near Trig. T I found the following fossils 

 in the limestone, and these are certainly the fossils that occur at Kakanui 

 Quarry: Terebratida oamarutica Boehm, Aetheia gcmlteri (Morris), *Hemi- 

 thyris sp. nov., Terebratella oamarutica Boehm, Terebratuliyia suessi (Hutt.), 

 Magella carinata Thomson. 



I searched carefully for the basalt flow (bed 6), but could find none, 

 although the mineral breccia is present beneath the limestone everywhere 

 in this locality. 



If the evidence detailed above is accepted, it is impossible that Professor 

 Park's classification of the Tertiaries in the Oamaru district can stand (see 

 " Geology of New Zealand," 1910, Whitcombe and Tombs, p. 120). The 

 sequence in the present locality, at all events, does not show two limestones 

 separated by greensands (Hutchinson Quarry and Awamoa beds). 



(4.) Three Roads. 



I have given this name to a locality one mile north-east of Trig. T. It 

 is just where the mineral breccia crops out on the coast for the last time 

 going north. 



The section given above (fig. 2) showed the beds which formed the northern 

 limb of the syncline dipping south. The mineral breccia then extends 

 about a mile along the coast to the present locality. Its strike-lines are 

 clearly traceable on the beach at low tide, swinging round in sweeping 

 curves from a N.E.-S.W. to a N.W.-S.E. strike at the present locality. 

 The mineral breccia here has much the same nature as that described in the 

 last section, though it is finer in texture. Thin veins of limestone penetrate 

 the breccia near the surface. From the highest portion exposed I collected 

 the following fossils : Turbo marshalli Thomson ?, Lima sp. a£f. angulata 

 Sow., Ostrea sp., Venericardia australis Lamk., Diplodonta zelandica (Gray), 

 Chione chiloensis truncata Suter, *Dosinia caerulea (Reeve), Mesodesma sub- 

 triangulatum (Gray). 



Although the fossils are not numerous here, it is pretty evident that the 

 above are similar to those found near Trig. T ; in the present locality, there- 

 fore, the breccia collected from represents the upper portion. About 200 

 yards from the outcrop of breccia on the beach, in a cutting in the road 

 that runs east and west, another small section is exposed, showing a glauco- 

 nitic nodular band 6 in. thick. Cleavage fragments of hornblende were 

 scattered sporadically throughout the limestone, and the nodules are cha- 

 racterized by the peculiar brown sheen that usually covers the exterior. I 

 collected the following species from this bed : *Pecten polymorphoides Zittel, 

 Dentalium solidum Hutt., Aetheia gaulteri (Morris). *Terebratula oamarutica 

 Boehm, Terebratulina suessi (Hutt.), Isis dactyla Ten. -Woods. 



Overlying this bed is a calcareous glauconitic greensand, but the thick- 

 ness could not be estimated. In the highest part of the exposure I collected 

 Pecten delicatulus Hutt. and Pachymagas parki (Hutt.). 



