Field notes : December 18, 1882-February 10, 1883

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Expeditions Information

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Charles D. Walcott records geological observations of Chuar Canyon and Unkar Valley along the Colorado River, December 18, 1882-February 10, 1883. The journal style entries are listed by date and pages are numbered. He includes overview descriptions of the formations, and then details descriptions of formations and stone observed, usually in descriptions of sections. He describes Devonian, Carboniferous, and Algonkian layers and fossils found. Detailed descriptions are also given of erosion in valleys, buttes, and lava deposits. Detailed sketches are found throughout.

Date Range


Start Date

Dec 18, 1882

End Date

Feb 10, 1883

Access Information

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  • Geology, Stratigraphic--Proterozoic
  • Geology
  • Geology, Stratigraphic--Devonian
  • Paleontology
  • Geology, Stratigraphic--Carboniferous


  • Chuar Valley
  • United States
  • Colorado River
  • Arizona
  • Unkar Creek


  • Fieldbook record
  • Field notes
  • Illustrations

Accession #

SIA RU007004

Collection name

Charles D. Walcott Collection,1851-1940 and undated

Physical Description

1 notebook

Physical Location

Smithsonian Institution Archives


Box 32 Folder 3