NIAGARA PERIOD
\na͡ɪˈaɡɹə pˈi͡əɹɪəd], \naɪˈaɡɹə pˈiəɹɪəd], \n_aɪ__ˈa_ɡ_ɹ_ə p_ˈiə_ɹ_ɪ__ə_d]\
Definitions of NIAGARA PERIOD
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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.
By Oddity Software
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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.
By Noah Webster.
