Table of Formations

Table of Formations

The Table of Formations is a schematic representation of the stratigraphic succession of geological units and serves as a fundamental reference for all energy, mineral, and groundwater resource industries in Alberta to identify and properly name the geological formations encountered by wells (Figure 1).  The Alberta Table of Formations is the starting point and key reference for any geological investigation or exploration within the province. 

Figure 1. Alberta Table of Formations
(click image to download PDF)

The Alberta Geological Survey has taken responsibility for updating the Table of Formations and maintaining supporting documentation to accurately represent the most current state of geological knowledge, ensuring the communication of vital, accurate, and credible information to decision-makers, industry, and the general public. These updates will be included in the “Lexicon of Alberta Stratigraphy,” a database under development to contain historic and current stratigraphic rock unit terms and descriptions. 

Our understanding of Alberta’s subsurface geology is constantly evolving with new drilling, sample analysis, and publications.  As this information becomes available, we will evaluate and determine if updates to the Alberta Table of Formations are necessary to ensure that it reflects the current status of scientific geological knowledge.  All updates to the Table of Formations will be recorded in the Change Log, which provides references to the scientific literature that supports the changes.

We encourage people to continually check this website for the most up-to-date version of the Table of Formations. If you have any questions, concerns, or scientific updates that you would like to alert us to, please send them to  We would love to hear from you.