448 VOYAGE TO THE 



c ^ p - layers of limestone, and where the rocks were more 

 ^-v^ abrupt, limestone of a more compact nature. In 



fgfe this cliff there was also an alum slate of a dark- 

 bluish colour. We could not land at the next cliff, 

 but on a close view of the rock conjectured it to 

 consist of compact limestone, dipping to the E.N.E. 

 at an angle of 30°. Cape Deceit, the next headland, 

 appeared to be compact limestone also, in large 

 angular blocks devoid of any distinct stratafication. 

 Proceeding on to Gullhead which is a narrow rocky 

 peninsula stretching a mile into the sea, we found it 

 chiefly composed of slaty limestone of a blackish 

 and grayish colour, containing particles of talc in 

 larger or smaller quantities as it was elevated above 

 or on a level with the sea, but without any visible 

 stratafication. A bed of slate to the eastward of the 

 promontory bore strong marks of its having been 

 subjected to the action of fire. The slaty limestone 

 of the cliff on the eastern side of this dips at an an- 

 gle of about 65° to the eastward. The neck or isth- 

 mus is either unstratafied, or its beds are perpendi- 

 cular ; beyond it the strata dip to the west at nearly 

 a right angle. 



Eight miles further along the coast, we landed at 

 the first of a series of low points, with small bays 

 between them, which continue about four miles, 

 beyond which the coast assumes a totally different 

 character. On these low points, as well as upon the 

 shores of the bay, we were surprised to find large 

 blocks of porous vesicular lava, and more compact 

 lava containing portions of olivine. These blocks 

 are accumulated in much larger quantities on the 

 points, and in the bays form reefs off the coast which 

 are dangerous to boats passing close along the shore. 



