NOTICES OF THE GEOLOGY OF THE EAST COAST OF JOIIORB. fl31 
Cases often occur where, from the want of a combination of pheno¬ 
mena, we cannot advance beyond an answer to the first of the two 
questions which T have said are necessarily raised by every iron- 
masked rock. The isolated masses of coral observed by Dr. Bland 
and myself appear to be such cases. I cannot say that these corals 
were not contemporary with the emission of the plutonic vapours 
which stratified rocks on this coast, like others on all the coasts of 
Johore, have imbibed. All I can venture to say is that they have 
been saturated with iron in a state of solution or of vapour, which has 
become highly oxidised. Considering that I nowhere saw any co¬ 
ral in the strata along this coast, that the rocks of which it is com¬ 
posed are not calcareous, and that no fossils of any kind have yet 
been found in Johore, the probability is that the corals are modern, 
and that the iron was derived from rocks that formerly rose above 
the beach. In numerous localities along the southern shores of the 
Peninsula and the adjacent islands, ironmasked sandstone and con¬ 
glomerate are at present forming beneath the surface of the beach, 
by the percolation of water from ferruginous cliffs. On the east¬ 
ern bank of the estuary of the Johore the same effect is produc¬ 
ed by the water of a fresh water marsh draining through its porous 
margin of sand and saturating the sand of the beach, and the same 
process on a smaller scale is seen in many other places.- In these 
cases the iron is of animal origin. 
Advancing towards the Point, a few ledges, ironmasked and with 
included quartz, were passed. One of these near the point is highly 
silicified and compaet, but portions of the talcose shale occur in it. 
The dip here is about 45° towards the N.W., the strike N.E... S. 
W. Near the Point the quartz veins are very irregular both in size 
and direction. Sometimes several occur parallel to each other and 
at right angles to the strike. The strike varies, for at one place it 
was E. by S... W. by N. The dip was also much greater here, ap¬ 
proaching nearly to vertical. 
(To be continued) 
