AND GEOLOGY OF THE MALAY PENINSULA, 
127 
eil as along the northern coast. Hence in these parts the above ge¬ 
neral rule may be pretty safely applied, even where the shores can 
only be observed from some distance. We believe the greater part 
of the coast from Lumat to T, Burn, if examined minutely, would 
prove to be, on the whole, a wasting and not an advancing coast; al¬ 
though at particular places, owing to the nature of the sea bottom in 
front, the configuration of the shore, and the set of the currents, 
alluvium is at present being deposited. For instance, at present there 
Is a considerable bank stretching along the shore from Point Sizan 
off G. Burning (Mt. Formosa) to Pulo Cocob. Before the tidal cur¬ 
rents assumed, or sufficiently deepened, their present channels, they 
must have flowed with greater force over the space now 7 occupied by 
tliis bank and within Pulo Pisang.* The channel is now betw'een 
the edge of tliis bank and Channels Bank, the projecting land of T. 
Buru having probably tended to throw the ebb or greater current off 
the shore, and scoop out a channel in a direction right up the Strait. 
The bank is now rising, the water on it between Pulo Pi sang and the 
main, baying been found by Captain Congalton and Mr. Thomson in 
1846 to be much less than the depth in the ordinary charts. It will 
probably continue to decrease until T. Buru is wasted, or the channel 
between Sumatra bank and the Long Middle bank is filled up by the 
advance of the former. Tanjong Buru is protected by the islands, 
rocks and shoals stretching from T. Gul to the Rabbit and Coney, 
but is at present wasting, f 
j * On the east side of the most westerly of the smalt islets close to P. Pi- 
sing, Mr. Thomson found barnacles, or the casts of barnacles, converted 
into a hard siliceous rock, apparently a variety of Lydian stone. The im¬ 
pressions were very distinct and of different sizes, and the spot where they 
occur is five feet above high water mark. The elevation which this marks 
must be of an older date than that evinced by the agglutinated shells at the 
Elephant Hill and B. Duraldt Juru (ante p. p. 118,119.) It would even 
appear to be coeval w ith the great pi atonic intumescence of the Peninsula, 
because rocks silicificd and metamorphosed in precisely the same mode are 
found on P. Krimun Klein, on the mainland behind the Old Straits ef Sin¬ 
gapore, at T. Pjngrang, on the eastern islands (in the China sea) <X?c. 
t In old charts it appears as an Island, and Mr. Thomson informs us 
that there is still the appearance of a channel breaking the line of coast. The 
Point is a low mangrove fiat, and the Island was probably formed like Pu¬ 
lo Cocob by mangroves being trasported to a mud bank. From the point to 
P. Cocob the beach is sandy. A Biduanda Kallang of the Pulai informed 
us that he had crossed from that river to the coast, and found the whole 
to be a soft inud, 
