'Transactions of the Bombay Geographical Society, from September 1850 to June 1852. Edited by the Secretary. Volume X.' [‎202] (335/458)

202
GEOLOGY OP BOMBAY.
of Luximon Hurriclmnder, and of Parell Hill; along that of the Agri-
cultural Society, and thence along the upper slope of the valley
towards the old Artillery grounds at Matoonga, being discernible in
the tanks and wells as we proceed, to where it is hid under alluvium.
The lower portions of this beyond the Society’s Gardens are of a
blueish colour, and seem to have suffered much from crushing and
lateral pressure.
48.—Under the Chinchpoogly Hill is a large mass of fine even
grained compact trap, which forms the ridges just to the eastward, one
to the south of the Society’s Gardens, on the highest point of which
my house is built, seventy feet above the sea.
7 .— Sewree, or loivest Sedimentary Rocks .—The three sedimentary
beds at Sewree are so closely contiguous to each other that I have
treated them as one—two of them being very obviously a single bed
split into two by the intrusion of trap.
On cutting down the cliff betwixt my house and the sea with
the view of obtaining material to fill up the reclaimed ground for a
site for the works of the School of Industry, and a position for a
brick field, the following section was disclosed : a fragment only is
here given to illustrate the text—it will be found represented in full
amongst the lithographs at the end :—
49*—The face of the rock here represented is about thirty feet
from c to g —from ato g gives a cross section The shape revealed by cutting vertically through a land surface at right angles to the feature of interest. of this as seen in a well
partly re-opened, partly sunk six feet under the level of c.
50.—The burst of the Trap through the whole three beds of strati
fied rock I had unfortunately no means of tracing lower down,
or further out, than is here represented. The stratified beds were
examined a little out to sea, and found unbroken, so that it did not
extend as a vein further in tips direction. The melted matter has
here split one large mass of strata into three, pressing them down,
and distorting them, as above exhibited—the proof of the intrusion
lests on this, that the upper surface of c, and lower one of c, are
completely melted, the stratified portions being in general from two to
fom inches in thickness, sometimes as much as eight or ten at the
shaip salient angles * the same seems the case with the upper and lowei
beds of stratified matter, but there it is not so obvious, the he(b
being much less perfectly exposed. The stratified rock abounds
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