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Q&A

How to explain lack of flatland?

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I want to have an Earth like planet, but with most of the continents having very little flatland. Thus continents would be covered mostly by hills and mountains. I want the rest of the planet to be as similar to Earth as possible in size, gravity, ocean coverage, atmosphere, etc.

How do I explain this?

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This post was sourced from https://worldbuilding.stackexchange.com/q/61697. It is licensed under CC BY-SA 3.0.

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A recent Snowball Earth period might help.

Heavy glaciation can cause enormous changes to the terrain. There are no longer any glaciers where I live, but there once were, during a recent ice age. Their legacy includes

The formation of glacial valleys in particular can be quite extreme:


Gif courtesy of Wikipedia user Intexpliki under the Creative Commons Attribution-Share Alike 4.0 International license.

You could go with a normal ice age, but you won't see glaciation over all of the planet, just portions extending out from the poles, perhaps into the southern temperate zones. That's why a Snowball Earth scenario is better.

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