Figure 1
From: Experimental generation of fulgurite under realistic lightning discharge conditions

(a) An example of natural fulgurite (i.e., sand) from the Sahara Desert. (b) A representative cross-sectional and longitudinal views of a natural fulgurite with detailed morphological description. The orange square in the longitudinal view corresponds to the area where BSE images of the generated fulgurites in Fig. 4a–e are presented.