I made that map with ice sheets / glaciers extent data from the University of Cologne, I got the lakes on Canada.ca and many other shapefiles (borders mostly) from divagis.org

I got the information from the encyclopedia britannica and I read a couple of research papers.

I used QGIS for the basemap layer and Adobe Illustrator for everything else

Feedback welcome !

If you like maps, I have many more on my website :)

cheers !

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Mandatory xkcd.

Wish I new what the thin blue line is that crosses from Seattle to Maryland.

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North of that line the climate was more than 12 degrees colder than today forcing settlers to move south.

Small typo, you wrote “hoping” when I think you meant “hopping” but it’s cool

Nice job. I learned a bit, you made it easy.

"Laurentides ice sheet" tbrnk pensais pas que les laurentides allaient aussi loin que ça

Just looks like every winter to me :)

Thanks for doing this.

Can you do the same for the ice sheets over Europe and Asia?

Dang, that must have been better than what we have now...

You might make an adjustment to your map.

The Puget Lobe of the Cordilleran Ice sheet stretched at least as far as south as Olympia. It carved out the Puget sound and was estimated to be 3000 feet thick in Seattle.

New England skiing musta been awesome!

You are a fantastic cartographer!!

So I’ve been hiking all over Manitoulin Island in Ontario for pretty much my entire life. (It’s in northern Lake Huron).

Even if you’re well off any trails, you never need a compass. The glaciers pushed down from the north, and left deep gouges in the exposed rock as they pushed south.

Just look for the gouges in the exposed fossilized coral reefs. They’re all north/south. The entire island is a compass.

Man, America must have been so pristine and beautiful back them. Especially places like Oregon, California and Washington before western settlements… not that it isn’t today, (ill spare you the 21st century dread.) it was just pure untouched natural glory.

Canadians be living even closer to the US

This is such a good poster!!!!! I made my first academic poster not long ago and it was good, but this is phenomenal

Tout le Canada être comme : TOKEBECICCITE

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This. And it extended farther South almost to Spokane. An ice dam formed where the Clark Fork empties into Lake Pend Orellie, forming glacial Lake Missoula, and leading to epic flossing during the thaw.

I would love to plumb the 18,000 BC shoreline for settlements.

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Not enough moisture in this region, too dry !

Excellent work of art and science