So, what are these things do you think? Are they snow drifts, or sand dunes?

Yes to both.

These were the surreal conditions in my front yard last week, after a cold snap and some very strong winds first created sculpted snow drifts, then covered them in dirt. The surface was such that you could walk on it, and I’m no featherweight.

Things are melting now, which means that a lot of dirt is being dumped on top of the grass in my front yard.