409 
APP. N°. I.] MINERALOGY. 
Remains of plants with tropical characters, in their native 
place of growth, under the 70th degree of North latitude, 
is a fact which leads to very extensive and remarkably cu¬ 
rious discussions, in regard to the former state of the cli¬ 
mate of the northern regions of the globe, but which can¬ 
not be considered here. 
From the apparent great extent of the coal formation in 
Jameson’s Land, it is highly probable that it abounds in 
beds of coal, and if tins shall prove to be the case, it may, 
at some period, become useful to man. 
In Greenland, as in Scotland, the coal-formation is tra¬ 
versed by veins (dikes) of greenstone,—another fact, illus¬ 
trative of the similarity of this formation in both countries. 
% Secondary Trap and Porphyry Formation .—The 
occurrence of secondary trap and porphyry rocks, at Cape 
Brewster and Traill Island, affords an important contribu¬ 
tion to their geographical distribution ; and those who ad¬ 
vocate the volcanic theory of their formation, will adduce 
the facts brought to light by Captain Scoresby’s investiga¬ 
tions, as proofs of the former operations of volcanoes in 
Greenland. The hot-springs in the Island of Ouanastok, 
in Lat. 60°, on the west coast, mentioned by Giesecke, and 
the report of Zenetti, of the former existence of volcanoes 
in a state of activity in Greenland, will, by volcanists, be 
considered as favourable to the volcanic origin of the rocks 
just mentioned. 
