註釋 Describes results of a study to document the palynological record in a hydrocarbon exploration well that penetrated 3,200 metres of sediments through Tertiary strata in the Mackenzie Delta area. The result is a pollen distribution analysis that will serve as a standard for Tertiary sequences anywhere in the Arctic and subarctic regions of the world. Over 200 species were analyzed to produce the resulting zonation. The fossils studied also provide valuable information about the environments in which the deltaic and associated marine shelf sediments were deposited, and record the progressively cooling climatic conditions. Systematic taxonomic descriptions of species new to science or new to the area are included. 