A world with extra continents

Ok, the POD is that at some point around 80 million years ago, the East coast of North America breaks off. Then, around 75 million years ago, a western chunk of South America and California are torn off the Americas. Then, about 60 million years ago, a large amount of Brazil broke off. What would the effects be? I'm thinking climates would be very different, and many plants and animals would have evolved differently due to the nearby other continents, or the fact an ocean just appeared where they are. My World 4.PNG

My World 4.PNG
 
This is not ASB! There are no people. Now if people existed it would be ASB. I will admit it is almost ASB however.
 
Unless those geologists have godlike powers, they are not going to be able to be of any assistance to you.

Eh, he's trying to get an imput on how this could happen or what it would look like if it did. Comments like that don't help.
 
Geology PODs are really frustrating, because they so quickly get to the point of irrelevance: Anything plausible geophyiscally would of course, have changed chordate evolution enough to keep humanity from arising, so you can't do much there. Then once you start talking about ocean currents and weather system, the whole thing just sort of spirals out of control.

Which is all really a shame, because I think that general conversations about human migration and colonization in the past 5000 years given a new geography are really interesting - but the fun comes from talking about the Romans or the British or the Basques who come from recognizable lands in Europe, and they naturally wouldn't exist.
 
Whatif?,

I like your geography ideas. Well, except that all the extra continents are coming off the Americas. Give the Old World some trimming too. I mean, Eurasia can afford to lose a few pounds. :)

There will be changes to human migration patterns. The settlers of Hawaii and Tahiti will likely move west to these new continents. And then they can make another jump to the Americas.

Hmm, with the western coasts of North and South America split off, what happens to the Sierra Nevadas, Rockies, and Andes? I am guessing they don't appear. And what of the eastern arc of the Ring of Fire (that volcano and earthquake prone zone).

The mid-Atlantic continents probably mean earlier contact between the Americas, Europe, and Africa. Hmm, who settles the mid-Atlantic continents first?

I think the northern of the mid-Atlantic continents should have a civilization similar, or a mirror-image, of the Romans. Look, it's Italy's big brother! Only reversed. :)

Michael
 
Sounds interesting, read Turtledove's Atlantis series? I'm guessing that's where the inspiration came from. As others said, to make it easier on yourself make it ASB, and ignore the effects on Human development and just focus on how it might affect future human civilizations. Turtledove in the second book of his atlantis series makes mention of the effect that having a continent out in the middle atlantic does to the currents and thus the climate of Europe and Terranova.
 
Any geologists on the board? I could really use your help

Not a geologist, but I know enough to tell you that map is impossible. Island of California would be the only doable thing but it would be a narrow island (Baja+the Bay Area) some km off North America.
 
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