Triassic Sedimentary Layer Thickness Map for Western Canada

Shapefile data represents the thickness of Lower Watrous and Lower Amaranth sedimentary layers from the Triassic period in the Western Canada Sedimentary Basin. The dataset was created by the Alberta Geological Survey from mid-1990s digital archives and edited for consolidation in 2005-06. It is part of the Geological Atlas of the Western Canada Sedimentary Basin, specifically from Chapter 27, Figure 14.

Use Cases

• Analyze spatial patterns of Lower Watrous and Lower Amaranth isopach thickness for basin modeling.
• Integrate line feature isopach data with other subsurface layers for 3D geological reconstruction.
• Use the attributed shapefile features to map Triassic sediment distribution and depositional history.

Strengths

• Data was corrected, attributed, and consolidated into single files by feature type in 2005-06.
• Originates from the authoritative Geological Atlas of the Western Canada Sedimentary Basin.

Limitations

• Data originates from digital files created in the mid-1990s, potentially using outdated methods.
• Specific row counts, column details, and precise spatial extents are not provided in the description.

Provenance

Source

Alberta Geological Survey, Government of Alberta.

Collection Method

Produced from archived digital files, then edited to correct, attribute, and consolidate into shapefiles.

Time Range

Geological data from the Triassic period.

Freshness

Data was last updated on the platform in March 2026, though the underlying data is from earlier edits.

Geography

Western Canada Sedimentary Basin, specifically the Williston Basin and Sweetgrass Arch region.