15 
lias worn a valley. This has been 
submerged by a general sinking of the 
land, and the sea lias undoubtedly as¬ 
sisted to erode the bordering dill's. 
In many places round the roast the 
older beds of sandstone had not dis¬ 
appeared, and you can observe most 
interesting sections in plares where the 
diabase has come in contact with the 
sandstone. In some places the tran¬ 
sition from pure diabase to unaltered 
sandstone only occupied the space of 
about a foot, hut in most places the 
sandstone for many feet adjoining the 
diabase has been severely metamorphos¬ 
ed There are several narrow band- 
like sills of diabase scarcely a foot 
thick, which had forced their way 
through the strata. On the other 
band, you can see masses of sandstone 
entirely surrounded by diabase, but 
still retaining the characterist cs of a 
sedimentary rock. The sandstone it¬ 
self in many places shows very marked 
evidence of false bedding. In some 
sections scarcely one strata is parallel 
to another. The area in which these 
formations can all he < learly seen is 
the -ojstlmp surrounding the Remark¬ 
able Cave. The cave itself is traversed 
b.v a fault, this probably giving the 
original weakness for the’sea to work 
on. 
An interesting study can be made in 
this locality of the degrees of meta¬ 
morphism of the sandstone varying 
with distance from the diabase. Rome 
which the diabase has actually touched 
can hardly he d stingo is lied from that 
rook. In the strata further away the 
attendant hot water has dissolved or 
melted the sandstone entirely, and re¬ 
deposited it in the same place, but as 
a quartzite, very hard and glassy, in 
no way resembling sandstone, and de 
void of any trace of sedimentation, 
varying in colour from black and grey 
to a yellow putty colour. As the sand, 
stone lay a stage further away, this 
becomes less marked, until we see it 
tailing place only in certain strata, 
leaving the rock alternate strata of 
quartzite and sandstone. They are 
usually of different colours, some band¬ 
ed black and white, or white and yel¬ 
low, the banding showing very effec¬ 
tively on waterworn shingle. Finally, 
only the cementing material has been 
dissolved and redeposited round the 
grains of quartz forming the original 
sandstone, leaving the rock to all out¬ 
ward appearances sandstone, but very 
much harder. Many handsomely col¬ 
oured cobbles, showing all degrees of 
metamorphism, can be seen in profu¬ 
sion on the shingle beaches. 
In many places the sandstone or 
fpiartzite is twisted considerably. This 
Is very noticeable at the mouth of the 
Remarkable Cave. On the top of 
Brown Mountain there are many veins 
of quartzite :n the diabase resembling 
sandstone very closely. These are 
some remains of the overlying sand¬ 
stone through wh ch the diabase forced 
its wav. and most were probably de 
posited in cracks in the diabase after 
having been dissolved in hot water. 
There is an entire absence of re¬ 
mains of the nborignes, so common 
round our coast, though there are some 
traces on Point Poor. 'This may be 
due in the Safety Cove district to the 
inward march of the sand, which has 
formed considerable dunes, and covered 
the ground for some distance inland. 
At the Remarkable Cave. 
