A physical phenomenon often seen in wildfires where a burned tree trunk, stump, log, grass blade, or other vegetation will be curved inward, or cupped, on the side facing the fire. The sharpened point will be on the site away from the fire’s approach, and thus the open cup will face in the direction of the fire origin.
For more information on this term, see the interFIRE VR Resource File article: Investigating Wildfires: Part 2
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