James St. John:
"Violetta Granite" (granite, ~530-650 Ma, Neoproterozoic to Cambrian; Najran, Arabia)
James St. John:
"Tropical Brown Granite" (granite, ~530-650 Ma, Neoproterozoic to Cambrian; southern Arabian Shield)
James St. John:
Tachylite (end-September to earliest October 2007 eruption of Jabal al-Tair Volcano (Bird Island Volcano), southern Red Sea)
James St. John:
Chert (northern Arabian Desert)