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ApresEverything t1_iyp8dxo wrote

I was just there in October. It's likely dirt. We hiked up and into the glacier and the top of it is incredibly dirty. Just earth debris, sand, etc. Much of the sand in Iceland is volcanic, black.

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captainInjury t1_iyrjz4c wrote

My guide told me ash. But apparently the dirt is so ashy there’s really no difference.

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