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The Wet West, Great Lakes Earth by Jdailey1991 The Wet West, Great Lakes Earth by Jdailey1991
Map belongs to :iconlatexiana:

80 million years ago, eastern North America collided with western North America, creating the Rocky Mountains.  (Though to our eyes, they would've been a spine of Tetons as tall as Denali.)  65 million years ago, western North America became the setting of a horrifying series of flood basalt eruptions, one that totaled up to an area of 1,500,000 square miles, a volume of 512,000 cubic miles and a duration lasting ten to 12,000 years, more than fast enough to create the extinction of 60% of Great Lakes Earth's terrestrial species and 80% of its marine species.

Basalt may have resistance against water erosion.  Against uplift, not so much.  As the Rockies continued to rise, the increasing pressure buckled the Traps, creating cracks and weak spots that would one day be the lakes and rivers of western North America, Great Lakes Earth.  Five million years ago, ice would have played their part, expanding the depressions into large lakes.  Lake Bonneville, for example, is 1,000 feet at the deepest.

The Rockies stopped climbing as recently as 30 million years ago, right at the end of the Great Tectonic Uplift.  The tallest peak then may have been as tall as Kailash now--33,500 feet above sea level.  After 30 million years, the tallest peak is now 20,146 feet above sea level.  Behind those rugged peaks is a plateau covering the lands we'd call Nunavut, Northwest Territories, Alberta, Saskatchewan, Montana, Idaho, Wyoming, Colorado, Utah, Nevada, Arizona, New Mexico, the Rio Grande River and finishing in the Mexican regions of Chihuahua, Durango, Sinaloa, Sonora, Coahuila, Nuevo León, Tamaulipas, Aguascalientes, Guanajuato, San Luis Potosí and Zacatecas.

The plateau gradually slopes westward, from 16,000 feet above sea level in Lamar, CO to 3300 feet in Tonopah, NV.
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:iconlatexiana:
LaTexiana Featured By Owner Feb 12, 2017  Student Digital Artist
Am I to assume that water has the same physical properties in this universe as it does in ours? If so, then these rivers aren't possible. Also, has the topography completely changed as well? If not, then these rivers really aren't possible.
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:iconjdailey1991:
Jdailey1991 Featured By Owner Feb 12, 2017
The topography is not the same as back home.
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:iconhgfggg:
hgfggg Featured By Owner Feb 12, 2017
More weird interconnected giant river islands, but interesting.

Personally, I see the two rivers heading from the lakes to Cahuilla converging before they reach the lake.
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:iconjdailey1991:
Jdailey1991 Featured By Owner Feb 12, 2017
Will you stop with these island assumptions?


Reread the description.
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:iconhgfggg:
hgfggg Featured By Owner Edited Feb 12, 2017
Okay, fine. This map features numerous unrealistic "islands" which entirely surround areas of land and your rivers don't converge even when going downhill would mean that they would converge. Happy?
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:iconjdailey1991:
Jdailey1991 Featured By Owner Feb 12, 2017
You're still using the island assumption.
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:iconhgfggg:
hgfggg Featured By Owner Feb 12, 2017
Okay, fine, let's ignore the island part which you seem so keen to refute by saying it has to be surrounded by lots of water which it doesn't:

Your rivers don't converge when they go downhill even when going downhill would mean that they'd have to converge.
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:iconjdailey1991:
Jdailey1991 Featured By Owner Feb 12, 2017
Reread the description.  The clue is in there.
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:iconhgfggg:
hgfggg Featured By Owner Feb 12, 2017
So, effectively, the cracks in the basalt, which violate the actual map you're using, cause impossible rivers?
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:iconjdailey1991:
Jdailey1991 Featured By Owner Feb 12, 2017
I didn't say the topography is identical.  And it's not a violation--the cartographer is credited.
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(1 Reply)
:iconiasonkeltenkreuzler:
IasonKeltenkreuzler Featured By Owner Feb 12, 2017  Hobbyist Artist
Clap Clap Clap Floating Heart (Red) - F2U! 
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:iconhardwing:
Hardwing Featured By Owner Feb 12, 2017
Nice!
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