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Summary

Description

(view from the American side)

American Falls formed by water of the Niagara River cascading over an escarpment of Silurian-aged Lockport Group dolostones. This erosion-resistant stratigraphic interval forms an escarpment throughout much of eastern North American (America & Canada), from the Niagara area to Wisconsin. Dolostone is a crystalline-textured chemical sedimentary rock composed of dolomite (CaMg(CO3)2 - calcium magnesium carbonate). Most dolostones form by the diagenetic chemical addition of Mg to pre-existing limestones.
Date
Source American Falls (Niagara Falls, northwest of Buffalo, New York State, USA) 6
Author James St. John
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inception

1 September 2006

exposure time

0.008 second

focal length

6 millimetre

media type

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checksum

fba5489a0ec1d287ac9139272dc13d1fb5cf39e6

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current11:22, 5 December 2021Thumbnail for version as of 11:22, 5 December 20212,592 × 370 (769 KB)YvwvFile:American Falls (Niagara Falls, northwest of Buffalo, New York State, USA) 6 (20098603116).jpg cropped 77 % vertically using CropTool with precise mode.

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