What is this close-up picture? (WotsThat: Thin ice surface texture (macro))

Question

What object is shown in this zoomed-in close-up photo?

IgneousRex · Accepted Answer

Thin ice surface texture (macro). Ice on a pond doesn't freeze at a uniform thickness; it's often thinnest near moving water, drains, or objects sticking out, which is exactly why those spots are the most common places someone falls through.

Answer: Thin ice surface texture (macro)

More natural phenomenon close-ups