GEOLOGY AND SCENERY OF NORTHEAST COAST QT 
Ice Tickle Island or Rodney Mundy Island and cast his 
eye over the singularly varied landscape. Under his feet 
the observer will find the black ledges of trap. He speedily 
notes that all the rounded ridges or knob-like hills of the 
region have the same dark hue, and rightly concludes that 
they are composed of the same rock. Between the hills 
are short, broadly flaring valleys floored with light gray 
schistose rock peeping out through the moss or from 
beneath the curlewberry bushes and willows. Each of 
the two large islands, for about three-quarters of its surface, 
is underlain by the coarse-grained schists with some com- 
mon: granite. The remaining fourth of the surface is un- 
derlain by the trap. Many of the ancient fissures have 
parallel walls which are from ten to a hundred feet or more 
apart; others have doubly convex walls converging at the 
two ends of gigantic pods of trap up to a thousand feet in 
breadth and perhaps of twice that length. The trap being 
more resistant to the weather than the rocks it cuts, the 
hills have assumed the varying outlines of palisade, ridge, 
or dome, according to the shape of their respective bodies 
of intrusive rock. Such a landscape most tellingly declares 
the fact that in mountains generally, but especially in old 
mountains, the expression of the actual relief is really 
more controlled by the age-long sculpturing of the elements 
than by the original upheaval of the earth’s crust. The 
uplift and folding together of strata but furnished the raw 
material; the carving out of valleys by the weather, and 
particularly the destruction of the softer rock-belts, leaving 
the more slowly wasting, harder ones projecting, have 
evolved the finished product, the mountain topography 
of the present day. 
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