Speight and Wild. — Weka Pass Stone and Amuri TAmestone. 79 



other layers have the Weka Pass stone facies. Worm-borings are found ac 

 various levels, and very occasional nodules are sporadically distributed. 



Rock of similar features is to be seen on the north bank of the Waikari 

 Creek about two miles below the Waikari Township. In this place frag- 

 ments of whale-bone occur in rock of the Weka Pass type. 



There is no evidence in either of these localities of any break in the suc- 

 cession, the whole being certainly conformable. Although there is some 

 variation in the lithological character of the rock from that in typical locali- 

 ties, yet there is no reason to suppose that it has not been formerly in 

 close lateral continuity with the masses on the south side of the valley which 

 show the typical differentiation into stone of two facies. There is just the 

 difference that one would anticipate were the beds north of the Waikari 

 deposited in an area in closer proximity to a shore-line than that in which the 

 beds were deposited in the main Waipara, the Weka Pass, or the Cass Range 

 areas. The fact that the sequence is unbroken in what appears to be a 

 shallow-water facies, where one would anticipate breaks, supports the con- 

 tention that the deeper- water beds are conformable. 



Gore Bay. 



An interesting locality is Gore Bay, near Cheviot, where sections are 

 well exposed on the cliffs along the shore and on the southern side of the 

 gorge which the Jed River has cut along the line of junction of the grey- 

 wackes and the overlying Cretaceous and Tertiary beds. These latter are 

 bent up into a well-marked syncline, which forms such a characteristic 

 feature of the cliffs behind the sandhills of Gore Bay. Faulting is common, 

 and on the southern wing of the syncline this has resulted in considerable 

 crushing and brecciation along the belt of movement ; nevertheless the 

 relations of the beds are clear. The Amuri limestone in its typical facies 

 is somewhat thin in this locality — about 12 ft. ; but there is an under- 

 lying succession of marls with interstratified sandstone which is no doubt 

 the equivalent of the lower part of the Amuri limestone at Kaikoura 

 and other localities farther north and in the neighbourhood of Weka Pass. 

 The upper surface shows a characteristic junction, with phosphatic nodules, 

 succeeded by a calcareous greensand, the probable equivalent of the Weka 

 Pass stone. (See Hutton, 1885, p. 271, for a similar occurrence near Stony- 

 hurst.) There is no evidence, however, of an unconformity, the sequence 

 throughout being entirely regular. The following is a detailed description 

 of the occurrence in a deep washout in the cliffs about a quarter of a mile 

 north of the disused landing-stage at Port Robinson. The beds are much 

 crushed, but their relations in the vicinity of the line of junction are clear 

 and characteristic. (Plate VI, fig. 1.) 



Amuri Limestone. — The typical portion is about 12 ft. thick, but it is 

 underlain by greyish marl. Borings begin about 3 ft. below the upper 

 surface, but they increase in number till the contact is reached. The 

 cavities are filled with greensand. 



Nodular Layer. — This is 6 in. to 8 in. thick. The nodules are in a matrix 

 of greensand, some being of phosphatized limestone, the other more charac- 

 teristic ones varying in colour from light green through olive-green to dark 

 green and black. 



Calcareous Greensand. — This is the probable equivalent of the Weka 

 Pass stone. It is strongly calcareous, and contains nodules sporadically 

 up to 3 ft. above the junction. Some of these have the external appearance 

 of greywacke but are distinctly phosphatic, and are dark green in colour. 

 They are up to 1\ in. in diameter, but numbers of them are small. 



