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  • 21 Aug, 2019

  • By, Wikipedia

File:Grass Valley Geologic Map.jpg
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Captions

Grass Valley Geologic Map, showing the location of the North star, Empire, and Maryland mines

Items portrayed in this file

depicts

Grass Valley

geological map

media type

image/jpeg

File history

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Date/TimeThumbnailDimensionsUserComment
current22:30, 24 March 2022Thumbnail for version as of 22:30, 24 March 20221,123 × 885 (332 KB)Pi3.124Uploaded a work by W. D. Johnston Jr. from The gold quartz veins of Grass Valley, California Professional Paper 194, https://pubs.er.usgs.gov/publication/pp194 with UploadWizard

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