10 



suites *& either broken up mechanically by the waves, or wasted away chemically from being 

 mwc susceptible nf rapid decomposition than ihu adjoining bauds, and Urn* wider fis- 

 sures or diasmn are produced, 



There iii a small rocky islet at group of rocks Dear the 5E> Point of /\ Linn called 

 S*kodo f from ai fancied resemblance of one of the blocks lo ^ frog. Those in the middle 

 are largo a in] conuceledl by sand in which some shrubs grow, and those scattered around 

 arc imatler uud much worn by the wave*. Some large rocks also lie in the sea on Ihe 

 south side of the central collection, and the longer sides; of those run S\\ T by \V +J NE. 

 by £. I'arcllcl reddUfi lint? or hands about '/* an inch broad Inverse the turfaccs and 

 mark the planes of weaker cohesion. The tides of some of I In: blocks, are peeling oh? in 

 parallel foyers. In lomej another set of divisional planes, tram verse to the former,, are 

 well marked. Where the rock is breaking down, these two systems of planes divide it in* 

 to rhomboidal fragmcn l«- 



The rocks* ore oC a large grained granite i and arc in Tact the bust specimens of well mark- 

 ed and regular granitic crystaUiial nm that I Uav< hcnmi around /Mt> Chin, The Immhteii- 

 de instead of bciujj col levied in nests of small granules inEcrmiiod with felspar, or disiv* 

 tninalcd in minute particles, as is genrr.iik I lie case euen in Che most highly cryptnllitcd 

 rocks of the bland, is here in well defined crystals of various siies and mostly of a fibrous 

 sE rue lure, nfica is present "F a Que lustrous, black colour with a faint blush of red. Nests 

 occur from an inch to a few iridic* in diameter composed principally or Undy granular 

 hnnibleiide in term tied with a lesser proportion of fdspar and coutaiiu'ng occasionally a crys- 

 tal of mica* 



The eastern end of the faUildj in place or contracting to a mEie point like the western , 

 presents a coast of towjidcnblo extent. This arises from the eastern portion oF the island 

 consisting of two hill ranges with a Hat mangrove tract between them. The termination of 

 the northern rairfjc cons &j tuns J In: NK. Point. The beach, is composed of ci tended tabu- 

 lar messes of rock which slope eurvately beneath the sea, and rise only a few feet 

 above it. They are crossed by fissures and small grooves , the direction of several of which 

 is S by SW. All the principal lines have a general direction towards SW., although 

 they vary within a small range. In, these a row of circular cavities hind with a ferrugi- 

 nous crust .ujmelinirjj occurs; and where this ii Ihe case^ the surface of the rock has a semi- 

 calcincd aspect. 



The rock varies M but is principally composed of an opm|ue bluisJi {;rey snccharoid fels- 

 palhic and trim rtao fclspaf hie hade enclosing crystals and rjrairiK of hornblende, and tr.i rn-hji - 1 1 l 

 crystals of felspar. It bear* a close resemblajKc to a i-pi-eLmerr uf Vcauvian lava including 

 hornblende Calais which I possess. In some places it becomes, compact, or the hornblende 

 nrjtrmU. are so itiiimt* as to ;i| |..'.-r litt- line bliSnk -lu.r hpririkhd on mow, \]\*\ 

 prevail over the felspar the rock has a bluish colour- The base has frequently a rrddith 

 brown and brownish «rry colour s but this is probably the result of incipient decomposition. 



Hounding the Point and proceeding westward alonjj the northern coasts ihe rocks preserve 

 the same character. They aro traversed here and there by rifts T and marked by fissure* 

 or grooves of a greater or less depth, hut moslly shallow. Where 1 noted the bearings e J 



