22152 - Nice Collection of 5 Fulgurites ("Petrified lightning") Collected in Algeria Otarionella †Calymenella Bergeron 1890 (trilobite)

†Calymenella Bergeron 1890 (trilobite)

Orthoceras rachidium

Yellow patches of sulfur (alteration) are widespread

10 Inch = 2

22152 - Nice Collection of 5 Fulgurites ("Petrified lightning") Collected in Algeria Otarionella †Calymenella Bergeron 1890 (trilobite)Nice Collection of 5 Fulgurites ("Petrified lightning"). Fulgurites are natural tubes, clumps, or masses of sintered, vitrified, and or fused soil, sand, rock, organic debris and other sediments that can form when lightning discharges into ground. They can therefore be referred to as petrified lightning. They are classified as a variety of the mineraloid lechatelierite, although their absolute chemical composition is dependent on the physical and