Grand Canyon NPS:
Grand Canyon Supergroup: Stromatolites in Bass Limestone_0019
Grand Canyon NPS:
Grand Canyon Supergroup_Bass and Hakatai Transition_0017
Grand Canyon NPS:
Grand Canyon Supergroup_Stromatolites in Bass Limestone_0020
Grand Canyon NPS:
Grand Canyon Supergroup_Hakatai Shale_0002
Grand Canyon NPS:
Grand Canyon Supergroup_Hakatai Bass Transition _0021
Grand Canyon NPS:
Grand Canyon Supergroup_ Hakatai Shale Flakes_0004
Grand Canyon NPS:
Grand Canyon Supergroup_ Hakatai Shale with Basalt Dike_0026