1921 .] 
Departmental Reports. 
27 
half a mile north of the Jed;, in the small tributary entering that stream 
near its mouth. Soft dark-coloured glauconitic claystones, covered with 
a yellowish efflorescence from the decomposition of the greensand, are 
exposed for a few chains along the shore at Port Robinson. Some layers 
contain numerous spherical concretions up to 2 ft. in diameter. The 
position of these rocks in the sequence is not definitely known, since they 
here lie between two faults, but they probably correspond with the basal 
glauconitic beds exposed in the Jed, which, except for the concretions, 
they closely resemble. 
The compact limestone layer at the top of this group of strata is by 
far the most resistant rock in it. Near the sea the limestone, 20 ft. to 30 ft. 
thick, and containing flint nodules, outcrops a few chains north of the 
bridge across Buxton Creek. From this point it may be traced continuously 
inland for two miles along the south side of the valley of Jed Stream. 
Two miles from the sea the limestone appears to the north of the Jed, and 
thence extends without a break northward along the western side of the 
Cheviot Hi]Ls to the Waiau-uha, where it outcrops near the mouth of 
Caroline Stream. Except in the lower valley of the Jed, the beds beneath 
the limestone are absent or poorly exposed. Only at one point were they 
observed, a mile and a half due east of Cheviot Township, wdiere the soft 
porous sandstone appears east of, and below, the limestone ridge that 
extends north from Mount Maccoinnich. At Port Robinson, north of the 
greensands already described, a small outcrop of the limestone occurs a 
few chains up a rill that has excavated a deep gash along a fault that here 
dislocates the strata. 
Fossils are rare in this group of beds. A few, very poorly preserved, 
were obtained from the argillaceous sandstone underlying the limestone. 
The precise locality is 30 chains from the sea, in a bend where the Jed 
impinges strongly against its right bank. Mr. J. Marwick has identified 
the following:— 
Anomia sp. Pecten chcithamensis (?) Hutt. 
*Malletia australis (Q. & G.). *Protocardia jmlchella (?) (Gray). 
Nucula sp. nov. cf. nitidula A. Ad. Tunitella sp. 
By careful collecting in this locality better material should be obtained. 
In 1882 McKay collected fossils from a locality described as the “ west 
slope of the Cheviot Hills ” (Loc. No. 502). No rock was observed in any 
way resembling the matrix, a hard calcareous fine conglomerate. The 
fossils have a Cretaceous aspect, and include— 
Aucella sp. 
Belemnites sp. 
Leda sp. 
Lima huttoni H. Woods (non Suter) = L. woodsi Suter. 
Nucula sp. 
Perissoptera novoseelandica Wilckens, MS.f 
Overlying the chalky limestone, with the peculiar contact that has 
already been described,J are massive layers of arenaceous mudstone. The 
* In this and succeeding lists species marked with an asterisk are living forms, 
t Described in report on Cretaceous gasteropods now in the press. 
•j See N.Z. Jour. Sci. & Tech., vol. 1, p. 172, 1918, and R. Spetght and L. J. Wild, 
Trans. N.Z. Inst., vol. 50, p. 79, 1918. 
