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2005 04 01
a Prehistory of Toronto - Geological Ages - 2
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ORDOVICIAN PERIOD : FORMATIONS

SIMCOE
SHADOW LAKE SANDSTONE
GULL RIVER LIMESTONE
TRENTON
COBOCONK LIMESTONE
KIRKFIELD LIMESTONE
VERULUM LIMESTONE
COBOURG LIMESTONE
GEORGIAN BAY SHALE
[email this story] Posted by Christopher Dewdney on 04/01 at 08:55 AM

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