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NIAGARA FALL - CANADA:- In Canada, The Story of the
Niagara fall began 600 million years ago. Canada future site of the Great Lakes stood at the centre of a broad, shallow sea that covered much of North America. Beneath these waters were the already ancient Pre-Cambrian
rocks of the Canadian Shield-the bowl- shaped basement of our continent. For 100 million years, rain and wind and the lapping of waves ground rocks into powder. Suddenly, the Earth shook, pushing forth the Appalachian
Mountains. Rivers flowed in new patterns, carrying mud westward. Where the rivers intermingled, huge muddy deltas formed, sprawling over 600 kilometres, from east of what is now Lake Ontario to beyond the present shore
of Lake Huron. That mud, cemented by the eons, forms the distinctive purple-red shale called the Queenstown Formation and the sandy ledge-forming rocks of Niagara Gorge. The waters over the future site of the fall were
tropical, for Central North America lay much closer to the equator than it does today. [NIAGARA FALL – CANADA]:- In this warm sea, tiny creatures built massive honeycombed reefs that appeared as grey and white shoals
in the troughs of waves. The Lockport Dolomite, which forms the cap rock of the Niagara Escarpments, consists largely of these grounds up coral reefs. Fifty million years later, while the first reptiles were slowly
establishing their dominion over the planet, great rivers crisscrossed central North America, etching patterns into this soft, sandy rock and undermining the harder limestone. This random erosion formed the basins for
Lakes Michigan and Huron, and later, Erie and Ontario. In Canada During the last Ice Age- the Wisconsin Glaciations-the north polar cap expanded greatly, covering most of Canada in a vast sheet of ice a kilometre and a
half thick. Eventually the face of the glacier, taller than the tallest skyscraper, extended east and west from where tourists view Niagara Falls today. Lake Erie spilled over the top of the Escarpment to a lower level,
a basin called Lake Iroquois that was the forerunner of Lake Ontario in Canada. At first, the Erie waters drained to the lower lake by way of a small intermediate lake called Tonawanda, which, in turn, drained over the
escarpment through several spillways. But gradually the drainage from Erie to Iroquois concentrated into one channel, the ancestor of the Canada - Niagara River. Lake Iroquois was roughly the same shape as the Lake
Ontario it was to become, but its water level was higher and its basin larger. Ice that still lay near the Thousand Islands blocked it from the St. Lawrence Valley. Niagara-on-the-Lake was submerged and the Iroquois
waters lapped at the top of Queenstown Heights. Finally, the ice sheet stopped growing, bested by a slight increase in the average yearly temperature. The leading edge of the glacier began to melt, forming a giant muddy
mess shot through with the boulders it had picked up during its journey. At last, the ice pulled away from The Thousand Islands. In a spectacular rush, the waters of Lake Iroquois began to surge through this newly opened
channel and eventually drained into the Atlantic of this day NIAGARA FALL – CANADA. HAPPY DAYS FOR TOURIST IN CANADA. |
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