Dunvegan Formation Isopach and Lithofacies Polygons

Mid-1990s GIS polygon features depict the thickness and rock type distribution of the Cretaceous Dunvegan Formation within the Western Canada Sedimentary Basin. The Alberta Geological Survey created the original digital files, which were later edited and consolidated by the Government of Alberta between 2005 and 2006. This dataset is part of a larger geological atlas chapter.

Use Cases

• Model subsurface reservoir geometry using polygon features representing isopach thickness.
• Analyze spatial relationships between different lithofacies polygons for paleoenvironmental reconstruction.
• Integrate lithofacies polygon data with other geological layers for basin-scale resource assessment.

Strengths

• Data consolidated from archived files into single files by feature type for easier use.
• Polygon features are attributed, providing structured geospatial data.

Limitations

• Original data creation dates to the mid-1990s, potentially lacking modern refinements.
• Specific row counts, column details, and sample data are unavailable for assessing completeness.

Provenance

Source

Alberta Geological Survey, Government of Alberta.

Collection Method

Produced from archived digital shapefiles, later edited to correct and attribute data.

Time Range

Cretaceous period (geological time).

Freshness

Data was edited in 2005-06; the underlying source material is from the mid-1990s.

Geography

Western Canada Sedimentary Basin.