Funny story:

As an undergrad, I was on a geology field trip to The Great Sand Dunes in Colorado. If you are not familiar with the National Park, it is a huge dune field in a mountain valley: https://www.nps.gov/grsa/index.htm
Well, this was the early 1980's, and geology field trips often involved a certain amount of drinking. The cold night we camped there was no exception.

So, the next morning, we go out on the dunes to talk geology. We come across an anomaly; a small pile of wind sculpted sand standing above the surface by a few inches. The professor, an old hand nearing retirement, is perplexed. He's never seen anything quite like it. Next thing you know, he is methodically dissecting the form, noting an increased water content, the internal bedding structure...

Meanwhile, two female students, part of the class gathered around this investigation, are barely able to contain their laughter. Finally, they lose control, almost literally rolling on the sand laughing.

The prof stands up and demands an explanation. Somehow, through gasps of laughter, one of them says, "Well, we were out here last night with some beers, and do you see a tree or a bush anywhere? When you have to go, you have to go."

I think about that story every time I see strange shapes in a cold aeolian environment.

But this one is a puzzlement, for sure. What is the cement? Hope they are getting an up close view, getting readings. Are there more around?