Weird soil composition---know of a good soils map?

I saw this in the woods today, and it's still bugging me. I was on private land (w/ permission) in someone's back acreage, maybe 300ft from the road. It is a 1/4 acre or so, kind of a big barren patch in the middle of deep woods.

The soil is kind of grey, feels like very soft sand, not silt, but almost that feel.  I can't tell if it's naturally occurring, or someone dumped something or it's a space ship landing pad.  

White pine, apple, maple, and ferns grow all around it, there appears to be a little wetlands area above it, and a small spring fed pond which apparently is similar to quick sand, Yikes!

There are a few large boulders and stone walls.  The area has a few plants, but is mostly pretty barren looking, what's there reminds me of lichen.  

I'm going back to scoop some for the extension folks at UVM.  But in the meantime I'm so darn curious!

Thanks for reading.

Located in Chester, Vermont for the soil sleuths out there.

Maybe Winooski Soil? See  https://www.nrcs.usda.gov/wps/portal/nrcs/detail/vt/soils/?cid=nrcs142p2_010594

There are areas of mineral deposits everywhere.  

But I’m betting on Aliens.  Grays probably.