Essas, Cr, 247 
appearing to be ina state of incipient decomposi- 
tion. Some of the fragments partake of the 
nature of Hornblende, and these are also greatly 
diversified. This extensive groupe is in con- 
junction with the calcareous portion of the hill, 
she separate rocks penetrate deep into the earth; 
their relative position, in regard to the general 
‘Basis of this ridge, the Poudingue above des- 
-eribed, I was not able to ascertain ; but I after- 
"wards fonnd the same minerals in other parts of 
these hills, and the extistence of extensive beds 
-of siliceous stones, of almost every kind, in the 
grand central range and in the separate ridges 
deviating to the South, of which separate frag- 
ments are often carried down by the rivers, has 
been pointed out in the first section of the Mi- 
neralogical Essay. 
The principal Cavern in the whole peninsula 
of Karang-bollong, is situated about one mile 
West of Guwo-dahar, i in contacr with the Ocean ; 
from its size it is denominated Guwogedé, or 
the large Cavern: its height and transverse 
diameter are much greater than those of the 
Cavern abovementioned, but it does not extend 
so far into the hills. The perpendicular des- 
cent externally, from the eminence above the 
entrance at the cmn. is about i Sos: ] its 
ments et eon E Lava and other volca- 
LA 
pore disposed in 
n ic miateridis are- 
ich is more nis ess =: 
