James St. John:
Alnoite lamprophyre (Oka Carbonatite Complex, Early Cretaceous, 124-125 Ma; Oka Niobium Mine, Quebec, Canada)
James St. John:
Alnoite (Chilwa Alkaline Province, Early Cretaceous, 111 to 138 Ma; Chilwa Island, Lake Chilwa, Malawi, southeastern Africa)
James St. John:
Alnoite (Alnø Alkaline Complex, late Neoproterozoic, ~584 Ma; Alnø Island, Sweden)