Figure 1b. Sulfur pyramids at Fort McMurray. Note the scale bar. Sulfur is also known as brimstone as it can form at the brim of volcanoes. It is a byproduct of refining oil sands.
Originally uploaded in NAGT:Our Resources:Publications:In the Trenches:2018 - Volume 8:In the Trenches - April 2018.
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Uploaded: Apr10 18