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This document describes a legacy collection of 2,263 scanned well logs from 621 distinct wells in the Piceance Basin of western Colorado, now made publicly available for long-term preservation. The dataset includes various log types—gamma ray, sonic, neutron, caliper, and lithologic descriptions—with a primary focus on intervals within the Green River Formation, a region notable for its significant oil shale deposits. The logs are provided in PDF and TIFF formats, with file sizes ranging up to 560 megabytes and an average size of 33 megabytes. Image quality varies considerably, reflecting the condition of the original source materials. Due to the departure of key project staff, limited quality assurance and quality...


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