Cracks in thick ice ?
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by
simonron
I can just see a sharp edged crack along the center lines of the fading black smudges. Is this a set of old fading marks where the sub surface is sinking back in to the top layer after being ejected through the cracks - which can't be seen when the ejection is fresh.
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by
Djbooth
Definitely a network of interconnecting cracks.
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