Four sections of type late Jurassic Nikanassin Formation from the central foothills of Alberta are presented.

Mechanical analyses of seven samples are given on histograms and cumulative frequency curves. A depauperate foraminiferal assemblage is listed. Heavy mineral descriptions are given throughout a complete section and eighty-two thin sections are analyzed.

The Nakanassin Formation belongs to the upper part of the Oxfordian Stage

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and subsequent Jurassic stages. The Nikanassin is partially marine and partially continental; deposition may have taken place in shallow embayments connected to the open sea by narrow chanel-ways. The Nikanassin was largely derived from pre-existing sediments.

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