Tuesday, December 18, 2012

The Great Lakes is another phenomena that shows how Planet Earth is changing.


 
Scientists have traced the formation of the Five Great Lakes and Niagara Falls to their inception.  These  Lakes are the largest body of fresh water in the world.  Many water supplies are gleaned from these legendary waters.
 
The shape of the body of water that creates the powerful water fall feeding into the Great Lakes is changing.  It is getting larger and the northeastern edge of it is moving outward toward the ocean. 

The expected results of a larger perimeter is that due to spreading out over a greater area it will become too shallow.  Shallow water isn’t able  to provide the driving force that has kept Niagra Falls as a significant source of power. Since the power of the falls generates a lot of electricity, the shallower lake basin became an item of concern some years back.
 
Researchers have finally concluded that the origin of the Lakes evolves from two different glaciers that moved down from the North Pole.  As it were, when these huge glaciers moved southward, they picked up land mass dragging heavy rock and earth along their path.
 
When this happened the tons and tons of ice became even heavier.  As they moved and scraped the rock surfaces, the weight also compressed the earth.  Thus, the freshwater left behind by the melting ice created these wondrous lakes.
 
The St. Laurence Seaway leads from the Atlantic Ocean, and was once used as a path of travel for early settlers in the new world.
 
Over the past fifteen years, the Niagara Falls as well as the five Great Lakes have seemed to be getting lower water levels.  Naturally, the first thought was that the water is evaporating, or that there hasn't been enough rainfall.  However, the cause is much more complicated.
 
The new theory is that the compression that created the lake basins is loosening up.  Is it because of global warming? 
 
After substantial research, scientists found evidence of crystallized lava.  From this discovery, the deduction is that the St. Lawrence seaway is the result of a fissure, or a fault line that also filled with water flowing in from the Atlantic Ocean.
 
Though they only could speculate, geologists do sense that a heat source lays deep below this ancient fault line that may have erupted after the glaciers went through.  In any event, the scientists and geologists feel that heat rising from inside the earth, is causing the land below the Great Lakes to expand upward. 
 
Hence, as the lake bottoms rise, the water is moving elsewhere. 




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