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OF TH_E " WEKA-PASS STONE OF NEW ZEALAND.
269
the Grey Marl, and the Mount-Browu beds were all conformable *.
This explanation of the district has not since been called in question
by any one.
Fig. 1. — Section across the River Waipara. (Distance 6 miles.)
liiTcr Waipara.
Boby
Creek. Fault. 3rt. Brown.
1. Hokanui Sandstone.
2. Green Sandstones. ". Waipara Sy-
3. Amiiri Limestone. J stem.
4. Weka-pass Stone.
5. Grey Marl.
6. Mt. -Brown beds. Oamaru System.
7. Pareora System.
8. Pleistocene gravels.
WeTca Pass. — In my report of 1873, just mentioned, I said that
here, as at the Waipara, the Weka-pass Stone rested on a water-
worn surface of the Amuri limestone. As the correctness of this
statement has been denied, I again visited the locality last December,
but found no reason to alter my former opinion. The great masses
of limestone which are seen on the west side of the road in the centre of
the pass, and on both sides near the northern end, belong to the Weka-
pass Stone. The Amuri limestone hardlj^ shows in the pass, but is
exposed in a cutting made by the Weka Creek, a little to the north
of the railway-viaduct (fig. 2), where both railway and road cross
the stream, about a mile and a half from the north end of the pass,
or two miles and a half from the Waikari railway-station. Here the
Fig. 2. — Section along Wela Pass. (Distance 4 miles.)
Viaduct.
2 3 4
23° S.S.E.
5j 4 5 6
Fault.
For explanation see fig. 1.
E.S.E.
stream has cut a small gorge on the east side of the railway and
parallel to it, in which the junction between the two rocks is clearly
exposed. This is, I believe, the only section in the neighbourhood
in which the actual junction of the two rocks can be studied. Both
rocks have here the same dip, but they are easily distinguished.
The Amuri limestone is a white, rather argillaceous, much-jointed
limestone, in thin parallel beds, and the exposed surface has in con-
sequence a shattered appearance. The Weka-pass Stone is a pale

• ' Geological Eeports,' 1873-74, p. 44 (published in 187i).