Uttley. — Geology of the Oamarit-Papakaio District. 



123 



hard limestone with looser glauconitic sand, giving the rock a flaggy appear- 

 ance. At their base the greensand (c) is intermingled with limestone, 

 and where the former has been removed by weathering an irregular nodular 

 surface is exposed on the surface of the limestone. 



From the upper glauconitic portion of the limestone (6) I collected the 

 following forms : Liothyrella boehmi Thomson, L. landonensis Thomson, 

 Terebratulina suessi (Hutt.), Pachymagas ellipticus Thomson, Rhizothyris 

 rhizoida (Hutt.), Aetheia gualteri (Morris), and Hemiihyris sp. 



S23'£ 



Fig. 5. — Section, Landon Creek, Papakaio district, (a) Tuffs : (b) limestone ; (c) green- 

 sand .- (d) hard glauconitic band; (e) river gravels. 



The greensand (c) yielded Epitonium lyratum (Zitt.), Pecten poly- 

 morphoides Zitt.. Terebratulina suessi (Hutt.), Pachymagas parte (Hutt.), 

 Rhizothyris rhizoida, (Hutt.), Aetheia gualteri (Morris), Hem.ithyris sp., and 

 Mopsea hamiltoni (Thomson) (?). A hard glauconitic band (d) overlies, 

 containing Pachymagas parte (Hutt.) and Rhizothyris rhizoida (Hutt.). 



The sequence in this locality differs somewhat from the section in Water- 

 race Creek, for the breccia is missing, and the hardened limestone in the 

 latter locality is apparently represented by the flaggy limestone in the present 

 section, and the latter is evidently at the horizon of the nodular band in the 

 Kakanui localitv. 



5. Flume Creel-, Papakaio District. (Fig. 6.) 



This section is exposed near the township of Papakaio in a small gully, 

 spanned by the flume of the water-race. The section is not continuous, 

 and the dip of the rocks in the lower part of the creek varies somewhat. 

 There are distinct signs of faulting in the neighbourhood. At the head 

 of the gully a bed of diatomaceous earth crops out, and lower down a small 

 exposure on the left shows the same bed lying beneath a fine calcareous 

 tachylytic tuff, dipping N. 70° E. at 20°. Greenish-brown laminated tuffs (c) 



cu b c d F e f 



Fig. 6. — (a) Diatomaceous earth ; (b) taehylyte tuff ; (c) fine laminated tuffs ; (<7) lime- 

 stone ; (e) tuffs j (/) glauconitic limestone ; (g) hardened limestone ; (h) green- 

 sand ; (F) fault. 



overlie, and then follows a flaggy limestone (d). There is a break in the 

 section at this point, but tuffs containing minerals occur in situ at the 

 bottom of the bank. Then follows a coarser and more glauconitic lime- 

 stone, which has a steeper dip than the lower flaggy limestone. A hard 

 band of limestone (g) about 15 ft. thick caps the more glauconitic stone. 

 Greensand (h) lies hard upon (g), and the junction is marked by the great 

 abundance of the stems of Mopsea. 



