498 NEW SOUTH WALES. 
no traces of crystallization, scarcely glistening lustre, almost impal- 
pable texture, and affording a smooth sub-conchoidal surface of frac- 
ture. <A few grains of chrysolite may with difficulty be distinguished. 
This is its character at Prospect and Pennant Hills near Paramatta, 
where it is quarried for macadamizing roads. The same variety was 
met with at Puenbuen. 
B. A similar rock to A, but breaking with a rough fracture. It is 
the prevailing rock at Kiama. 
C. A similar rock to A, but containing more chrysolite. It occurs 
at Puenbuen. 
D. A similar rock to B, but of a light grayish-blue colour. This 
is met with near Broughton’s Head, Illawarra, and to the northwest 
of Kiama. 
Ix. A dark bluish rock, finely porphyritic, with small points (not 
tables) of feldspar. It occurs at Prospect Hill. 
I’. A compact porphyritic basalt, with distinct crystals of feldspar, 
but none of augite. It occurs to the north of Kiama, in Coolomgata, 
at Shoalhaven, and also at Keelhocue. 
G. A porphyritic basalt, in which the augite and feldspar are both 
distinct, and some of the crystals of the augite are a fourth of an inch 
long. It occurs at Prospect Hill. 
H. A feldspathic rock, consisting almost purely of thin tables of 
feldspar ageregated into a moderately compact rock, with occasional 
geodes of smaller feldspar crystals. Some small specks of augite 
appear disseminated through it, and more resemble green earth than 
augite. It occurs at Prospect Hill. 
I. Compact basalt, more or less vesicular, and containing geodes of 
chalcedony and other amyegdaloidal minerals. Met with at Puenbuen 
and in Illawarra. 
K. An amygdaloidal basalt, consisting of nodules of cale spar, 
thickly disseminated through a compact base. ‘The calcareous nodules 
compose, in some parts, more than half the material of the rock. 
These varieties graduate into one another. At Prospect Hill, the 
compact black basalt changes to a compact rock, with disseminated 
points of feldspar; next, to a porphyritic basalt, with distinct crystals 
of both augite and feldspar; and next, to the feldspar rock (H), in 
which augite is almost wholly wanting. Near Kiama, the dark com- 
pact basalt (B) passes into a subporphyritic variety, containing rarely 
a light brownish crystal of feldspar, and then into a coarsely porphy- 
ritic basalt, containing large tables of feldspar. It varies in colour from 
