to the bedding, here 45° N.W., seems to be purely fortuitous, no similar features having been found elsewhere in the sub-sector. The fact that the angle of 45° is a common dip with the basal Awatere beds of the Haldon Hills district on both sides of the Haldon Hills Fault, however, may indicate that this is a critical angle for compressive stress, which is relieved by fracturing after the beds have been deformed by that amount. In various sections in the northern sub-sector, the Amuri Limestone is followed by a mash, a few inches or feet in thickness, of “Grey Marl” and conglomerate fragments, and then by a moderate thickness of Great Marlborough Conglomerate, which is succeeded once more by Amuri Limestone. Three such occurrences were studied in reasonably clear sections: (i) the small strip of conglomerate north of the Pimple, which may be seen to perfection in the gorge of Washdyke Stream, (ii) the long strip which, commencing near the upper end of the Washdyke gorge, crosses Woodbank Stream below the junction of its two main branches and appears finally at the mouth of Deadman Stream, and (iii) the strip, with a base of conglomerate-marl mash, involved between the two parallel limestone ridges of the Razor Back. (i) Washdyke Section. This section is difficult to decipher, being complicated by the effects of a fault which strikes almost along the stream. A result of this, or another fault, is that the sequence including the smash-band is repeated, and strong folding may also have occurred since the movement which gave rise to the band. Part of the succession of beds, stripped of details, may be studied in Fig. 3, a view southwards across Washdyke Stream north-north-east from the Pimple, which is just out of view to the right. Outcrops near the sky-line are of Great Marlborough Conglomerate constituting the ridge north of Kawau-nui Stream, and the section shown in the south bank and tributaries of Washdyke Stream, reading from east (left) to west (right) is: “Grey Marl,” Amuri Limestone (white), Great Marlborough Conglomerate (dark) separated from the limestone by the smash-band, “Grey Marl,” Amuri Limestone in a small ridge, and finally “Grey Marl,” beyond which repetition occurs due to later faulting. These alternations of strata occur in too small a compass to be delineated on the map supplied with the writer's other paper referred to above. The western (second) ridge of limestone apparently marks an anticlinal between two outcrops of the “Grey Marl,” and in this connection it may be noted that the writer found blocks of sandstone at about this position in the bed of the stream which appeared “foreign” to the surrounding outcrops and contained fragments of a fibrous shell and sections of bones, indicating that the Cretaceous may be nipped in the anticlinal or at a fault close by. As may be seen in the illustration (Fig. 3), all the beds and the smash-band stand at high angles. (ii) Woodbank Section. The view shown in Fig. 4 is south-westwards across the gorge of Woodbank Stream, along a tributary valley the floor of which is composed of conglomerate while the ridges on either side are of Amuri Limestone, a relation which also shows in the walls of the Woodbank gorge. This section is related to that