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niagara period definition and meaning
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.
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rock shaft
orchester
oseretsky test
seethed
stevedore
hemato
infielder
affected
grilling
tres tyne
chickens
influencing
retiniphorae
loop the loop
vower
dead sea
purfle
self condemning
blore
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oppugned
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pasilaly
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basi
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schwann's white substance
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