Fig. 1: The New Port Richey fulgurite images and microscopy.
From: Routes to reduction of phosphate by high-energy events
a Glassy tubes that consist of a glassy melt surrounding an internal void, in turn surrounded by a crust consisting of cemented sand grains. The diameter of the fulgurite is 2 cm, and length is 7 cm. b Spherules of gray, metallic material within the fulgurite with diameters of 1.1 cm (left) and 0.5 cm (right). c BSE image of the glass of the NPR fulgurite. Varied lithologies of the glass include a darker material (left) composed of SiO2, and a lighter material (Ca, Al-rich silicate). Within this glass (red rectangle is the region expanded) are d spherules of iron metal enriched in phosphorus. e BSE image of the large metallic spherules of the NPR fulgurite. These consist of FeSi2 (medium gray), FeSi (light gray), and a Ca–P–O material that includes CaHPO3 (dark gray). f The Ca–P–O material is mostly in contact with FeSi.
