Geologic Resources
Resources for Geoprofessionals

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Niagara Falls, Providence
of Ontario, Canada and New York State, USA (along the international boundary). These
falls are caused by the resistant Lockport Formation, a Middle Silurian
limestone and dolostone which constitutes the rim and overlies the softer Rochester Formation, a
Lower Silurian shale. Niagara Falls has a drop of about 170 feet
(52 meters).
Image source:
freeimages.co.uk.
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