Earth is missing a huge part of its crust. Now we may know why. (Thieves?)

nationalgeographic.com ^ | 12/31/2018 | Robin George Andrews

[SunkenCiv]

My doctor just recently told me, “no more pizza”. I’m thinking of getting my gravestone done in the shape of a couple of pizza slices.

[crusty old prospector]

Although there could have been some glaciation during the time that is missing during the Great Unconformity, I doubt it was one big ball of ice for 400 million years.

[gleeaikin]

When was this guy Joe Schem writing? I thought the Ice Ages were around 100k apart not 40k, and only for about the last million years. The article said this covering by ice was half a billion years ago. I doubt Grand Canyon was covered by ice in these past million years.

[SunkenCiv]

I think the link is in there, but anyway, been quite a few years. Regarding intervals:

https://www.livescience.com/58407-how-often-do-ice-ages-happen.html

and regarding Snowball Earth:

http://www.freerepublic.com/tag/snowballearth/index

[Fred Nerks]

...Understandably, not everything matches up perfectly, but the study’s narrative is “very plausible,” and its arguments are “pretty clever,” says Ian Fairchild, an emeritus professor of geosciences at the University of Birmingham who wasn’t involved in the research.

In other words, it's all just words...