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Filters: Tags: {"type":"location"} (X) > Types: Map Service (X) > partyWithName: U.S. Geological Survey ScienceBase (X)

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Hand specimens of rocks collected as a part of field work conducted primarily by present and former WGNHS staff members. Samples date from the early 20th century to the 1990s and were collected throughout the state. Many of the samples are described in the historical field notebook collection, and relationships between the samples and the field notebooks have been established and captured in identifiers. Locations for samples were taken from field notes, maps, and accession lists. There are approximately 5,700 hand samples in this collection.
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This collection consists of legacy geological maps created and collected by Warren Hobbs during his tungsten assessments during his career with the USGS. These maps are from locations across the western United States. These maps were gathered for the purpose of conducting a national tungsten assessment.


    map background search result map search result map Rock hand specimens from Wisconsin USGS S. Warren Hobbs Tungsten Map Collection Rock hand specimens from Wisconsin USGS S. Warren Hobbs Tungsten Map Collection