In several ways, this fault-scarp differs from that formed with the
Japanese earthquake of 1891. Throughout its course the down-throw,
wherever it is perceptible, is invariably to the west; in no place
could any trace of horizontal shifting be detected; and the plane of
the fault, when it traversed rock, is practically vertical.
Whether the scarp was formed by the elevation of the rock to the east
of the fault, or by the depression of that to the west, or by both
such movements at once, there is no decisive evidence; but there are
very good reasons for believing the first alternative to be the true
one. The undulations in the ground which gave rise to the large pools
at _c_ and _h_ (Fig. 76) occur on the east side of the fault. Also,
between the outlet of the lake at Jhira and the point where the
Krishnai rejoins its original channel, the gradient of the river
approaches that of a mountain stream, although the new bed consists of
alluvium, and not of rock. Now, the alluvial plain of this district is
raised so slightly above the sea-level that no subsidence great enough
to have caused the existing gradient could have occurred without the
depressed area being flooded with water. Though some movements may
have taken place on the west side of the fault, it seems clear, then,
that elevation of the rock on the east side was the predominant, if
not the sole, cause of the fault-scarp.
As the Chedrang fault has been described somewhat fully, a brief
reference to the rest will be sufficient The only other known scarp of
any consequence lies about ten miles to the south of the Chedrang
fault, and runs by the village of Samin, with an average course from
E. 30° S. to W. 30° N. Its total length does not exceed 2-1/2 miles.
The down-throw is uniformly to the north, and the throw, which
amounts to ten feet near its centre, gradually diminishes to zero at
either end. Several pools are formed along the course of the
fault-scarp by the blocking of small streams.
Public-domain text, read in full here on John Shaqi.
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