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Peculiar structure of Lockport Limestone exposed by quarrying in bed of old channels between Dufferin Islands, Niagara Falls. Province of Ontario, Canada. 1898. Peculiar structure of Lockport Limestone exposed by quarrying in bed of old channels between Dufferin Islands, Niagara Falls. Province of Ontario, Canada. 1898. Categories: Image; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Gilbert, G.K. Collection, Hillers J.K. Collection Niagara Falls, National Parks, Niagara Falls, Photographers, All tags... photo print, Fewer tags Curved slab of Lockport Limestone from bed of old channel between Dufferin Islands, Niagara Falls. Province of Ontario, Canada. 1898. Curved slab of Lockport Limestone from bed of old channel between Dufferin Islands, Niagara Falls. Shows surface markings. (One-half natural size). Province of Ontario, Canada. 1898. Categories: Image; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Gilbert, G.K. Collection, Hillers J.K. Collection Niagara Falls, National Parks, Niagara Falls, Photographers, All tags... photo print, Fewer tags « 1 2 3