Frozen Peas

Well, that's what they looked like to me. On our quad ride to Tony Lake last Saturday I found some very interesting snow, ice or frost formations while I was walking in the forest.

There were lots of little piles of round, peas-shaped ice. I thought maybe it was snow that melted and refroze, or maybe some type of hoar frost.

I tried a Google search and didn't come up with any answers. Do you know what this is called and how it is formed? I'd be very interested in getting some additional information. - Margy