"Niagara Period" is a word in ENGLISH
niagara period
ENGLISH
Definition:
A subdivision or the American Upper Silurian system,
embracing the Medina, Clinton, and Niagara epoch. The rocks of the
Niagara epoch, mostly limestones, are extensively distributed, and at
Niagara Falls consist of about eighty feet of shale supporting a
greater thickness of limestone, which is gradually undermined by the
removal of the shale. See Chart of Geology.
Few words of positivity
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medina epoch
ENGLISH
A subdivision of the Niagara period in the American upper Silurian, characterized by the formations known as the Oneida conglomerate, …
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