Field notes and maps, 1943-1944, includes region around Caborca, Sonora, Mexico

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This field book contains daily, diary like notes on the paleontological specimen and geology of Caborca, Sonora, Mexico taken from 23 March 1943 to 10 May 1944. Cooper describes stratigraphy, often providing color and consistency of shale in which fossils are found. Brachiopod, Trilobite, algae and other fossil specimen are noted. Locations Cooper visits include Altar, Chanate, Gachupin, Santa Theresa, Zorra, Arrojos, and other areas. Some coordinates are included. Jurassic, Cambrian, and Cretaceous specimen are noted. Many sketches are included. Pages are hand numbered, two sets: 1-81 (for 1943) and 1-70 (for 1944). Index on first page.

Date Range


Start Date

Mar 23, 1943

End Date

May 10, 1944

Access Information

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  • Geology
  • Paleontology


  • Zorra, Loma
  • El Chanate, Sierra
  • Mexico
  • Altar
  • Santa Theresa
  • Sonora
  • Gachupin, Rancho


  • Fieldbook record
  • Field notes
  • Diary

Accession #

SIA RU007318

Collection name

G. Arthur Cooper Papers, 1923-1993 and undated

Physical Description

1 field book

Physical Location

Smithsonian Institution Archives


Box 33 Folder 7