meaning of niagara
1. 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.
2. a river flowing from Lake Erie into Lake Ontario; forms boundary between Ontario and New York
Related Words
niagara | niagara falls | niagara river |
