372 



Transactions. 



Valley, and also on the end of the spur dividing that valley from Gold 

 Valley. These rocks are well developed on the western end of the Gebbie's 

 Pass ridge, and form the country round the heads of the streams running 

 therefrom both to the north and the south. The precise limits of this series 

 are at times difficult to determine, since a covering of soil masks the surface 

 and good exposures are rare, except where the rock has been quarried for 

 road-metal or building purposes. These beds are so siliceous in places that 

 many years ago they were prospected for gold, and numerous shafts and 



GEOLOGICAL SKETCH &IAP of 



AT HEAD OF 



LYTTELTOfl 



COUNTRY 



fx^vv^ra $* 



4- 4- 4- + 4 + + 

 '///■ 4- 4- + + + 

 / 4- 4- 4- 4- 4- 



Trias -Ju ret. Slates, tir eyti tic kes 8. Sandstone . 

 /'■' Volcanic Phase R huolitc Flows 8 Breccia . 

 2?. , , , f Jtasa Its normal ti a rictusit ic 



of the Lyttelton Volcano. 

 3:iVo(eas<i< Phase Basalts from M'Herbert . 



, . perhaps contemporaneous 



with the 3r* Volcanic Phase Quail Island. 



Fig. 2. 



drives were made, but without success. The strike of the beds is generally 

 in a north -and-south direction, with variations to the east and'west about 

 that mean ; a specially heavy band at the western head of Gebbie's Valley 

 si iows a north-west orientation. 



Up to the present no fossils have been discovered by which their true 

 age may be determined, but judging from their lithological characters 

 merelv they are of the same age as those which occur in the mountain 



