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Images database - Browsing Subjects - 'Great Lakes - History' (4 found) Mark  1. Title  Five Stages of the Gorge from "Our Romantic Niagara" by A.H. Tiplin Creator  Astrid Akkerman from a sketch by A.H. Tiplin Type  Still Image Collection  Niagara Falls Public Library Digital Collections Notes  This map shows the Great lakes in the period just before the present level of flow began. Again the Falls of Niagara cut a narrow section of gorge - Stage IV Whirlpool Rapids. N- Nipissing Outlet; o - Ottawa River; T- Trent Valley Date  1988 Physical items  Filing No.   Format        D504819  Scan from book      D504819A  Scan from book      2. Title  Former Outlets of the Great lakes from "Our Romantic Niagara" by A.H. Tiplin Creator  Astrid Akkerman from a sketch by A.H. Tiplin Type  Still Image Collection  Niagara Falls Public Library Digital Collections Notes  This sketch shows the former outlets of the Great lakes before the Falls cut back to the Glen. The arrow represents the slow retreat of the melting glacier, over a period of thousands of years. When the glacier was north of District "A" on the map, the easiest course for the melt waters was the Nipissing-Ottawa Outlet. When the surface of the land along this outlet rose after the weight of the glacier was removed from it, a new and lower passage for lake drainage opened up at "B", through Lake Simcoe and the Trent Valley System on to Lake Iroquois. The dotted area marked "E" shows the approximate size of the small Lake Erie whose waters formed stage II, the Old narrow or Erie Gorge. Modern lake Erie is shown at "C". Date  1988 Physical items  Filing No.   Format        D504840  Scan from book      3. Title  Official guide to Niagara - lake region after melting of the great glacier Description  Black & white scan from book ; modern lakes in light broken lines , ancient lakes shaded ; Notes  Scan from the book Official Guide Niagara Falls, River. Electric, Historic, Geologic, Hydraulic by Peter A. Porter with illustrations by Charles D Arnold published 1901 ; Date  1901. Collection  Niagara Falls Public Library Local History Collection Physical items  Filing No.   Format        D11925  Scan from book      4. Title  Our Home on the Steps from "Our Romantic Niagara" by A.H. Tiplin Creator  Astrid Akkerman from a sketch by A.H. Tiplin Type  Still Image Collection  Niagara Falls Public Library Digital Collections Notes  This map shows Our Home on the Steps, that is plateaus or cuestas, with their fringes of worn rock: A- Allegheny Plateau on the horizon; E- Erie Plain with Onodaga Escarpment; H- Huron Plain with Niagara Escarpment; O- Ontario basin fringing with crystalline rocks to the north, the lowest and most weathered lowland. Date  1988 Physical items  Filing No.   Format        D504843  Scan from book      D504843A  Scan from book

4 records found in Images database.  Displaying 1 to 4.

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