Image: IllinoisBasinMap
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IllinoisBasinMap.jpg (433 × 558 pixels, file size: 45 KB, MIME type: image/jpeg)
Description: Sketch map of Illinois Basin, USA, showing areas of petroleum and lead-zinc deposits
Title: IllinoisBasinMap
Credit: http://energy.usgs.gov/factsheets/Illinois/index.map.html
Author: USGS
Permission: US federal government
Usage Terms: Public domain
License: PD
Attribution Required?: No
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