Grewingkia canadensis, limestone fragment with two rugose corals
Bob Campbell Geology Museum Formation: McMillan Formation.
Grewingkia canadensis, three solitary homcorals, long and conical
Bob Campbell Geology Museum Formation: McMillan Formation.
Grewingkia canadensis, two incomplete solitary rugose corals
Bob Campbell Geology Museum Formation: McMillan Formation.
Grewingkia canadensis. two solitary rugose corals in limestone
Bob Campbell Geology Museum Formation: McMillan Formation.
Heliophyllum (Heliophyllum sp.) silicified section of solitary horn coal
Bob Campbell Geology Museum
Heterophrentis sp., short, cuning conical corals
Bob Campbell Geology Museum Formation: Lime Creek Formation.
Heterophrentis sp., short, curving conical corals
Bob Campbell Geology Museum Formation: Lime Creek Formation.
Horn coral (Helicophyllum sp.)
Bob Campbell Geology Museum 425 million years old; Formation: Jeffersonville Limestone.
Lophophyllidium proliferum, eight specimens
Bob Campbell Geology Museum Formation: Plattsburg Limestone; Member: Spring Hill Limestone.
Lophophyllidium proliferum, sing. coral, slightly curving
Bob Campbell Geology Museum Formation: Graham Formation.
Lophophyllidium proliferum, small, isolated horn coral, conical
Bob Campbell Geology Museum Formation: Oread Formation.
Lophophyllidium proliferum, sol. coral, thing slightly curving conical theca
Bob Campbell Geology Museum Formation: Graham Formation.
Lophophyllidium proliferum, three small corals
Bob Campbell Geology Museum Formation: Grenola Limestone.