Image: Placermine
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Placermine.jpg (273 × 194 pixels, file size: 17 KB, MIME type: image/jpeg)
Description: A sluice box used in placer mining.
Title: Placermine
Credit: from http://imcg.wr.usgs.gov/usbmak/borehole.html
Author: USGS
Usage Terms: Public domain
License: Public domain
Attribution Required?: No
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