Luhr, James, San Juan I, undated

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The field notes document the work of James F. Luhr in relation to his volcanology research in San Juan, Nayarit, Mexico. Data contains information on: directions to location, minerals observed, their geological characteristics, color, inclusions, metric measurements, LW, LG, UA (e.g. LW=31). There are drawings of the cross sections of geological structures with the indicators of the specimens with measurements are provided in inches. Sometimes, there can be seen specific mention of samples: quantity, identifier (e.g. 10 NP-2 W,G), note on photography, color, measurements in inches and centimeters. All pages are numbered.

Date Range


Start Date

Jan 11, 1977

End Date

Nov 15, 1979

Access Information

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  • Geology
  • Volcanology


  • San Juan, Volcan
  • Mexico


  • Fieldbook record
  • Field notes

Accession #

SIA Acc. 16-255

Collection name

National Museum of Natural History (U.S.), Department of Mineral Sciences, Curatorial Records, 1940-2016

Physical Description

field book

Physical Location

Smithsonian Institution Archives


Box 3 folder 2