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BULLETIN OF THE NATURAL HISTORY SOCIETY. 
corresponds to what in Scotland is known as the “ Crag and 
Tail/’ The rock, like that at Curries Mountain, is a dolerite or 
diabase, but is more coasely amygdaloidal, containing not un- 
frequently considerable cavities lined with quartz crystals, or of 
calcite encrusted with quartz. This overflow may have been 
connected with that of Curries Mountain, but the connection, if 
existing, is now obscured by the overlying rocks of the Coal 
Measures which occupy all the intervening area. Other localities 
for these volcanic outbursts are : the Miramichi river, about six 
miles above Boiestown, where again they form conspicuous 
bluffs ; the vicinity of Harvey Station where they include the 
eminence of Cranberry Hill, at the base of which passes the 
main line of the Canadian Pacific Railway, as well as Bald 
Mountain a few miles to the east; the west shore of the St. John 
river, near Long Island, in Queens County, where they spread 
over a large area and are associated with beds of limestone 
which by the heat accompanying their ejection have been con- 
verted into marbles ; and yet again about the Emigrant Settle- 
ment north of Grand Lake in the same county ; — in each of 
these instances exhibiting the same relations to the red and grey 
rocks, respectively beneath and above them, as are seen near 
Fredericton, and hence showing they all belong to the same 
great period , of volcanic activity. The red beds and associated 
limestones contain in many places corals and other forms of 
marine life, showing the presence of the sea at the time of their 
formation ; the grey beds on the other hand hold only the trunks 
and roots of trees and ferns, indicating their origin about fresh 
water streams and lakes. 
History.— From the above data it is easy to summarize the 
probable history of Curries Mountain. 
In the Lower Carboniferous period, antedating our own by 
some millions of years, the sea covered a large part of New 
Brunswick, including not only the great central triangular basin 
now occupied by large portions of York, Queens, Sunbury, 
Northumberland and Gloucester counties, but also a considerable 
