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Mid-1990s data edited in 2005-06 provides geospatial polygon features illustrating oil alteration zones within the Western Canada Sedimentary Basin. The dataset was created by the Alberta Geological Survey and consolidated from archived digital files as part of a geological atlas chapter. It represents a specific figure (Figure 25) from the chapter on Petroleum Generation and Migration.
License 'ab-ogla' may indicate specific Alberta Open Government License terms requiring review. Files are packaged in ZIP archives containing XML, HTML, and shapefile components.