Bondi. 
323 
The basalt is now decomposed into a soft, pasty clay. 
Recognisable specimens of Thinnfeldia have been 
found in the thinly-bedded sandstones. 
Recently some portions of the cliff have been cut 
down at Woolloomooloo Bay, close to the stone steps 
that lead down from Victoria Street North. The 
shales removed contain an abundance of Phyllotheca , 
Thinnfeldia , tiphenopteris, and fossil fish. 
At Bondi, as has been stated previously, several 
basaltic dykes, decomposed to a white clay, may be 
studied. At one point only, on the narrow path 
leading to the base of the cliff' through the old quarry, 
can undecomposed basalt be procured. The columnar 
sandstone, well developed here, is being quarried 
at so rapid a rate for road purposes, that the best 
examples will soon be things of the past. Columnar 
sandstone, or traces of columnar sandstone, have also 
been noted near Pymble, at La Perouse, at the quarry 
near the tram terminus, Five Dock, Blakehurst, 
Pyrmont, and on some parts of North Head facing the 
Pacific Ocean. 
A decomposed basaltic dyke is exposed in the 
cutting at the Bel more Railway Station. About a 
mile to the south-west, at Moorefields 1 , a basaltic dyke 
is quarried for road purposes. (See Fig. 15.) The 
locality can be reached in a ten minutes’ walk from 
Belmore Railway Station, and can be found by follow- 
ing the Moorefields Road in a southerly direction from 
the Moorefields Public School. 
1 Not to bo coufoumlcil with Mooreficli-ln, Kogarali. 
