Mini craters in lake ice

An article in Estonian local media tells about mini craters in lake of South Estonia (link to article).
Photos speak for themselves.

Brief translation: 1,5 weeks ago locals found strange little crater-like holes in lake ice, total of 8. As they discovered it, no footprints of human activity were found in the snow near craters. The crater holes seemed to be in triangle formation and the shape of craters in ice was conically shaped, giving the impression that some objects may have fallen from sky. In the edges of crates were tiny holes filled with grainy and slippery substance but unfortunately locals were unable to retrieve samples.

(sorry for my bad english :cool

[edit on 17-3-2009 by inxion]