GB Se ss ceed of Newfoundland. 
present difference from that of Hawaii is due solely to second- 
ary changes since eruption. In its present state it would be 
called by most lithologists a melaphyr. 
The same lava flows were seen on the south side of law 
rence Harbor on the main land. The specimen procured is 
somewhat more altered than the preceding, and contains calcite 
pee og ale ® ae yecule besides some pyrite. In the 
mposed 
latter after olivine was seen. 
Melaphyr (Dikes). 
On South West Point of Exploits Burnt Island a number of © 
dark melaphyr dikes were observed. A specimen (865) from 
one about two feet in width, cutting the diabase and striking | 
north and south, is a eccwhish black rock with yellows 
brown spots o decomposition, which resemble decomposed 
feldspars. It weathers brown and sehen and bee grains 
brownish section is composed o dee groundmass of 
augite microlites, biotite and mee holding larger augites, 
greenish viriditic and dolomitic pseudomorpbs after olivine, 
etc. The augite is mostly in yellowish and brownish elongat 
crystals, one magnetite inclusions. The biotite is in 
brown irregular scales, while considerable calcite and a green- _ 
is now present. ‘This rock is regarded as an old an 
slerea basalt. 
Diabase. 
The diabase (881) of Hoskin’s Harbor, Thwart Island, occurs — 
in a dike about twenty feet wide, running north and south, 
and cutting argillite. The rock is a gray finely crystalline 
