Blomidon 
of dark gray basaltic trap drops some two or 
three hundred feet from the top, from which 
the fir-trees look over. Below the trap is a 
wide sloping terrace of lighter gray amygdaloid, 
and below that the steep slope to the sea is 
of dark red sandstone, the same sandstone of 
which the cliffs along the shore are formed, 
and of which the rich red mud that makes 
the Cornwallis dike-lands so famous is largely 
composed. 
Blomidon's stern aspect is chiefly due to the 
vertical wall of rock that caps it, and the impres- 
sion it creates is not lessened when one thinks of 
the stupendous catastrophe that placed it there. 
The North Mountain ridge extends from 
Blomidon to Digby Gut, and from Digby Gut 
southward to Brier Island, where it ends. The 
underlying sandstone of the ridge was no doubt 
formed by the action of water at the level of 
the sea, and was at a later period elevated. 
But the bed of trap that covers the sandstone 
the whole length of the ridge was once a vast 
river of molten rock, poured out from some 
great volcanic crater, — or more probably series 
of craters. 
Just where these outlets were, no one knows; 
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