Fire was a key method in extracting stone in the old days – more important than we usually think of. Photo by Per Storemyr | Per Storemyr Geoarchaeology & Conservation

Fire was a key method in extracting stone in the old days – more important than we usually think of. Photo by Per Storemyr

By Per Storemyr | Published September 30, 2014 | Full size is 850 × 503 pixels

Fire was a key method in extracting stone in the old days – more important than we usually think of. Photo by Per Storemyr

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