Grand Canyon NPS:
Grand Canyon National Park- Redwall Limestone_0373
Grand Canyon NPS:
Grand Canyon National Park- Redwall Limestone_0507
Grand Canyon NPS:
Grand Canyon National Park- Redwall Limestone_0513
Grand Canyon NPS:
Grand Canyon National Park- Redwall Limestone_0579
Grand Canyon NPS:
Grand Canyon National Park: Rockslide from Hopi Point: Aug. 23, 2012
Grand Canyon NPS:
Grand Canyon National Park GRCA 3274: Fossil Fern
Grand Canyon NPS:
Grand Canyon National Park GRCA 7634 Fossil GASTROPOD STRAPAROLUS
Grand Canyon NPS:
Grand Canyon National Park GRCA 11098 Fossil Coral