356 I'ransactions. — Geology. 



important junctions occur, but the following is an approximation to the 

 sequence and thickness of the strata, as seen in descending order along the 

 north-east face of the bluff. 



I. — Chalk Group. 



a. Leda 3Iarls (700 feet). — Greenish sandy and argillaceous mai-ls, with 

 hard and soft layers. Pecten zitelli, Leda, Waldheimia, Scalaria, 

 Cidarites, and bone fragments. These marls strike N. 40° E., with an 

 increasing dip from 15° to 40° towards the base, where they gradually 

 pass into greensands or yellow calcareous sandstone speckled with 

 glauconite. 



h. FuGoidal Limestone (50 feet). — An indurated calcareous sandstone, 

 generally separated from {a) by a thin layer of brecciated fragments of 

 calcareous greensand, but frequently the greensand is interlaminated, 

 and fills the fucoid casts. The character of this junction is constant 

 over a large area^ — from the Weka Pass to the Kaikoura — but at the 

 latter place a corrugated concretion aiy disturbance of the calcareous 

 beds has given rise to an appai'ent unconformity. Fish teeth and Fucoids. 



c. Flaggy Limestone (30 feet). — Yellowish-white, smooth-grained lime- 

 stone, like indurated chalk, in thin layers. Pentacrinus, Pecten 

 (fragments, like P. hochstetteri), Inoceramus in lai'ge fragments. 



d. Cherty Limestone (300 feet). — Chalk, with flints. At Kaikoura the 

 flints are more abundant, and are sometimes quite black. 



e. Grey Limestone (100 feet).- — A gritty, subcrystalline limestone, weather- 



ing white. Worm casts and Pecten. 



f. Chalk Marl (300 feet). — With hard indurated bands and layers of green- 



sand. 



II. — Greensand Group. 



The strike changes in this group to IST. 20° E., the dip being 30° E.S.E. 



g. Teredo Limestone (20 feet). — Dark grey, subcrystalline, ferruginous 



limestone, weathers red, almost entirely composed of Teredo casts. 

 Contains Trigonia alceformis var., and Pentacrinus. 



h. Greensand (20 feet). — Incoherent, rather coarse-grained, clear sands, of 

 bright colours, generally green. 



i. Concretionary Greensand (300 feet). — Calcareous green or grey sand- 

 stone, with large calcareous concretions irregularly dispersed. 

 CucuUma {alta ?), Dentalium (like D. irregularis, but with large and 

 small ridges alternating), Tellina [scitulina ?), Leda, Scaphites or 

 Hainites, Ammonites (like A. daintreei, but still more compressed), 

 Belemnitella lindsayi (n. sp., also found over the brown coal at Green • 

 Island, near Dunedin), Inoceramus (large fragments). Plesiosaurus 

 australis (No. 1 h) was obtained fi-om this stratum. 



