Title

Former Outlets of the Great lakes from "Our Romantic Niagara" by A.H. Tiplin

Description

en-CA 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".

Identifier

http://www.nflibrary.ca/nfplindex/show.asp?b=1&ref=oo&id=385806

Creator

Astrid Akkerman from a sketch by A.H. Tiplin

Type

Still Image

Is Part Of

Niagara Falls Public Library Digital Collections

Extent

5" by 10"

Medium

Black & white sketch

Provenance

Niagara Falls Heritage Foundation Collection

Date

1988

Subject

Geology - Niagara Falls

Great Lakes - History

Spatial Coverage

Canada - Ontario

Source

Niagara Falls (Ont.) Public Library

number

D504840

Format

Scan from book

Date Created

2013-03-15

Date Modified

2013-03-15