#Fulgurite (or #thunder_arrow) is a trace left by lightning in the #sand (from Latin fulgur - #lightning). The high temperature of the lightning caused the sand to melt, forming natural #glass. Thunder arrow are a few centimeters wide and can be several meters long. The natural formation of fulgurite is a relatively rare natural #phenomenon.

#geology #meteorology #nature

Photo by Luis Lizama (first photo)

Photo by Artūras Štaudė (second photo)