Geology and Natural History. 231 
. 
pale buff, somewhat vesicular, magnesian limestone, entirely with- 
i i bo 
its similarity to that seen in Malade valley, I am led to expect 
similar results there when I work out its details, and that this 
Same Quebec roup age must finally be made to include the basal 
portion of the so-called Carboniferous limestone, through a large 
i i he fossils 
been overlooked heretofore, But for having suspected the age 
m the character of the rock, I should probably have given up 
the Search long before finding the fossils. 
'€ start to-morrow for the ascent of the Grand Teton, and are 
Sanguine of success, although the profile of the easiest slope 
shows in one part a rise of 63°, and most of the peak reaches 48°, 
inst. 
n Cha 
James Gurkin, F.R.S.E. (Geol. Mag., vols. viii, ix. ofessor 
lations, upward 00,000 years ago), owing to the eccentricity 
of the earth’s orbit being at a high value, and the winter of our 
emisphere happening to fall in aphelion, a climate of intense 
: e. t t 
Sinilar conditions characterized the mountainous and northern 
erica. 
(2.) That the greater contours of the land were assumed at a 
much earlier date than the advent of the Glacial epoch, and there- 
fore guided the flow of the ice from the high grounds to the sea. 
(3.) That, while the ice moved along the line of the principal 
i i dulations of the ground, and 
verflowed considerable hills. : ae 
(4.) That the ti grundmorinen,” and “ moraines profondes 
are the materials which gathered underneath the ice,—the general 
