43

Range, where a series of small domes and noses, superimposed on the
general anticlinorium, can be traced north 35 degrees west for about 44
miles from a point southeast of the main anticlinal axis, across that axis,
which there strikes north 65 degrees west, and across the valley of Jim
May Creek to the Ruby mineral deposit. Figures 3 and 4 show a
part of this ‘train’ of flexures, and also illustrate the general relation
between lineation, schistosity, and bedding in a relatively highly deformed
area of Tenakihi group rocks. Another well-developed ‘train’ of minor
flexures is exposed east of Orion Creek; it is at least 3 miles long, strikes
north 20 degrees west, and also crosses the crest of the anticlinorium, which
at this point strikes north 50 degrees west. The general structures of the
Tenakihi group rocks are reflected in the topography, and these ‘trains’
are in places conspicuous as lines of minor peaks, and systems of buttresses
and couloirs oblique to the general pattern of the terrain.

Scale of Feet

Trace of bedding plane

Trace of schistosity plane

Figure 4. Structure-section along line A-B, Figure 3, in Tenakihi group rocks.

RELATION BETWEEN LINEATION, SCHISTOSITY, AND BEDDING

An instructive example of the relations between lineation, schistosity,
and bedding in the Tenakihi group rocks was found in the Tenakihi Range
on the crest of the ridge immediately south of the headwaters of Jim May
Creek. At this place (See Figure 3) the crest of the ridge almost coincides
with the crest of the anticlinorium, here marked by a regular, northwest-
plunging anticline, locally free from minor contortions. At a point just
north of the crest of the anticline, approximately 5,000 feet stratigraphically
above the lowest exposed beds in this part of the map-area, a fragment of