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
The numerical value of niagara period in Chaldean Numerology is: 5
The numerical value of niagara period in Pythagorean Numerology is: 1
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- Periodo NiagaraItalian
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"niagara period." Definitions.net. STANDS4 LLC, 2018. Web. 23 Mar. 2018. <https://www.definitions.net/definition/niagara period>.