174 The N.Z. Journal of Science and Technology. [May 
A raised beach, 80 ft. to 90 ft. above sea-level, occurs both north and 
south of the mouth of Jed Stream. A higher beach may be traced from 
Gore Bay southward to the headland south of Port Robinson, where it 
varies from 220 ft. to 250 ft. above sea-level. From Gore Bay northward 
to the mouth of Jed Stream a raised beach, 10 ft. to 15 ft. above sea-level, 
occurs, and in its southern portion this is backed by sand-dunes which 
attain a height of 100 ft. Similar raised beaches to those just mentioned 
occur at Amuri Bluff and elsewhere on the Marlborough coast.* 
Wide-stretching terraces from 80 ft. to 120 ft. above the stream-bed 
occur north of the Hurunui River to the eastward of Domett, and terraces 
which must be several hundred feet higher are a prominent feature on 
the opposite side of the valley. Jed Stream drains the extensive flat at 
the eastern end of which the township of Cheviot is situated, by means of 
a comparatively narrow valley five miles in length. This flat, which is 
entirely surrounded by low hills or rolling downs, is from 200 ft. to 250 ft. 
above sea-level. The debris covering it, together with the gravels and 
sands forming the terraces and flood-plains of the Hurunui and other 
streams, and those occurring along the sea-front, constitute the Pleistocene 
and Recent deposits of the district. 
Economic Geology. 
Pebbles of phosphatized limestone from the conglomerate band over- 
lying the limestone that outcrops on the roadside a few chains north of 
the bridge over Buxton Creek were collected for analysis. A sample 
representing 6 in. of limestone, 2 in. phosphatized pebbles, and 30 in. of 
the overlying glauconitic calcareous sandstone was also taken from the 
same place. On analysis these were found to contain— 
Insoluble in acid 
Calcium carbonate .. 
Phosphoric anhydride 
Pebbles. General Sample. 
5-73 24-85 ' 
45-40 52-04 
16-36 3-76 
On the old road round the cliffs, 10 chains south of the bluff separating 
Gore Bay and Port Robinson, limestone overlain by a conglomerate 6 in. 
thick, of which the pebbles are of phosphatized limestone, appears for a 
few feet. This exposure is bounded on the north by a fault, and on the 
south by debris from the cliff. Yon Haastf mentions the occurrence of 
a “ peculiar greensand conglomerate about 3 ft. thick ” resting on the 
oldest rocks of the district on the northern bank of Jed Stream. The 
deposit, he states, appears again at the southern end of the coastal section. 
This conglomerate probably consists of pebbles of phosphatized limestone. 
On this occasion the bed of Jed Stream was not examined. Near Port 
Robinson, where the other occurrence is stated to be, the whole hillside 
is moving seaward, and the contact between the breccia of greywacke 
boulders and the younger rocks was not observed. 
Attention may be drawn to the similar occurrences of phosphatized 
conglomerate north of the Cheviot district at Kaikoura and Amuri Bluff.{ 
In these localities, however, the phosphatic layers are not necessarily of the 
same age as those here described. 
* P. G. Morgan, Notes of a Visit to Marlborough and North Canterbury, 10th 
Ann. Rep. N.Z. Geol. Survey, Parliamentary Paper C.-2b, 1916, p. 24. 
f Op. cit., pp. 41, 42. 
j P. G. Morgan, op. cit., pp. 22, 23, 25. 
