Caliane
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It looks like the stairs are made of some kind of concrete. and someone poured water at the top or the mixture was simply too wet, before it was fully set. The sludgy overflow, then cascaded down. that would explain the odd creases, in the sludge. the solid staying and clumping, while the water evaporated.
or, given too wet concrete would destroy its longevity.. perhaps whatever they used for retention failed. im sure they didnt have 1x10's... maybe they used reed, or something and that bent and split over. if THAT happened, you would expect some of the material to be there at the crease/overflow covered up.
or, given too wet concrete would destroy its longevity.. perhaps whatever they used for retention failed. im sure they didnt have 1x10's... maybe they used reed, or something and that bent and split over. if THAT happened, you would expect some of the material to be there at the crease/overflow covered up.
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