Rock specimen of the first geological era from Phantom Ranch Grand Canyon on a plastic base
Date1945-1987
Mediumvishnu schist, plastic, and paper
DimensionsBase: 7 x 6 3/4 x 1 1/4 in. (17.8 x 17.1 x 3.2 cm) Rock: 2 x 5 1/2 x 1. 15 in
ClassificationsDocumentary Artifact
Catalog number1988.2.337
DescriptionThe rock sample (vishnu schist) sits on a plastic base that contains a paper explanation: "Rock specimen of the first geological era: Archeozoic (Archean era) oldest known rocks, highly metamorphosed equivalents of all types of sedimentary and igneous rocks. Name: Vishnu schist from the bottom of the Grand Canyon at Phantom Ranch. Grand Canyon National Park, Arizona. Louis Schellbroek, Chief Park Naturalist." The rock is long, narrow, gray, pink and sparkly.Status
Not on view
June 30, 1977
c. 1995
Archaeological Research Services Inc.
11/3/1983
