260 Geology and Mineralogy of the 
but running both abruptly and insensibly into cream or 
straw yellow, red, blue, and light green. It clearly observes 
a north west course, either at a high angle north east, or ver- 
tically. This greenstone is a slate on the south east side of 
the excellent harbor at the west end of the promontory. 
he greenstone of the contiguous large island (proceeding 
north west) is at first fora short distance brown, in shades, 
and slaty, and then becomes almost pure hornblende, split- 
ting into thick blocks, and containing few or no nodules ; 
occasionally however changing to a reddish hue from a pre- 
deipmagee of feldspar, as the flattened rhombs of that min- 
eral in the fissures would seem toindicate. The rock soon 
after continues to the end of the island in the form it wore 
on the promontory, with smaller granitoid nodules. Some- 
times the splinteriness is remarkably great. The direction, 
&e. continue the same. 
rals found are galena, in a thready vein three yards long, 
“ipping obliquely into the rock, and cale spar 
am at present unable to apply the proper tests from not hay- 
