Ha! Great catch,
warrior1991. If this appeared on the GMAT, it would absolutely be wrong, because it literally says that scientists are buried beneath half a mile of snow and ice in Greenland. And that would suck for the scientists.
Here's the thing: the GMAT tests a whole bunch of random things that nobody actually cares about in real life. If you read some of the world's best-written publications, you'll see all sorts of things that would be wrong on the GMAT. I'm a big fan of The Economist (or at least I used to be, back when I had time to read), and in every Economist article, you'll see a pile of phrases that would be wrong on the GMAT.
Here are a bunch of examples.
Frankly, I side with The Economist in real life. I would also side with the New York Times for the most part. If New York Times editors don't care about the modifier error, I'm not sure that we should, either. But the GMAT still does, for whatever reason. So we're stuck with it.
And while I'm ripping on GMAT SC: a ton of the CORRECT answers are incredibly crappy sentences. I used to manage a fairly large team of writers, and there's no way that I would have hired anybody who writes like the GMAT does. The GMAT is stuck in some ridiculous 1930s definition of "correct" English, and I don't really understand why.
In short: don't let reality get in the way of your GMAT! SC operates under its own quirky rules, and those rules don't always have anything to do with good, well-written, modern English.