015 Niagara Gorge Trail Series is a photograph by Michael Frank Jr which was uploaded on August 4th, 2012.
015 Niagara Gorge Trail Series
...As the Glacier retreated, the upper Lakes began draining into the lower lakes at five to six locations across the Niagara Escarpment.
Twelve... more
Title
015 Niagara Gorge Trail Series
Artist
Michael Frank Jr
Medium
Photograph - Photography
Description
...As the Glacier retreated, the upper Lakes began draining into the lower lakes at five to six locations across the Niagara Escarpment.
Twelve thousand years ago, the Niagara River ultimately became the main water outlet over the Niagara Escarpment. The waters of a much
larger Lake Erie began to flow over the escarpment into a larger Lake Iroquois (Lake Ontario).
The Niagara River began to flow from the Lake Erie basin through Lake Tonawanda and down the present path of the river to the escarpment.
At this time, the lake plain from Queenston to Niagara on the Lake was covered with the waters of Lake Iroquois (Lake Ontario). The height
of the lake was within 11 meters (35 feet) of the average level of the Niagara Escarpment at Queenston, Ontario.
The height of the initial Niagara Falls was only 11 meters (35 feet) as it flowed over the Niagara Escarpment at Queenston to the waters
of Lake Iroquois below. As the water flowed over the escarpment to the water below, the water began eating through the glacial material and
the limestone rock of the Niagara Escarpment to begin the formation of the Niagara Gorge.
The site of the birth of Niagara Falls was discovered by a geologist named Doctor Roy Spencer and today this site is known as "Roy Terrace".
The flow rate of water back then was only twenty-five percent of the present flow rate. Scientists have calculated that the volume of water
flowing over the Falls initially was 37,500 cubic feet per second.
As the Glacier continued receding further north, it opened silt barriers allowing waters to drain to the ocean resulting in the lowering of
the water levels of Lake Iroquois (Lake Ontario).
The rising of the northern crust of the earth, a reflex action to the weight of a Glacier a half a mile or more thick, caused a faster outpouring
of Lake Iroquois (Lake Ontario). The lower 11.2 kilometer (7 mile) stretch of the Niagara River to Lake Ontario was once 19 kilometers (12 miles) long.
Scientists have suggested that the eastern part of the North American continent is still in the process of tilting as part of the glacial reflex action.
As the crust of the earth rises along the eastern seaboard the water flowing from the Great Lakes system will become slower.
The beginning of the last glacial retreat began 12,000 years ago. The third and last Wisconsin Glacier retreated east of Hudson Bay in Labrador.
As the glacier retreated, the land began to rise. The crust of earth rocks are elastic when bent over large sections.
as per... http://www.niagarafrontier.com/origins.html
Uploaded
August 4th, 2012
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