Early Tertiary Clastic Lithofacies Report From 1982 Yukon Field Work

1982 field work identified eight lithofacies types in west-central Yukon, including Gms, Gm, Sr, Sp, Sh, F1, Fsc, and L. These lithofacies are grouped into four interpreted depositional assemblages and arranged into at least ten fining-upward megacycles. The report documents observations from the Sixtymile River and Grayling Creek areas.

Use Cases

• Classify sedimentary deposits by mapping the eight lithofacies types (Gms, Gm, Sr, Sp, Sh, F1, Fsc, L) to depositional environments.
• Analyze the spatial distribution of lithofacies assemblages, comparing presence in the Sixtymile River area versus the Grayling Creek area.
• Interpret tectonic history by examining the sequence of at least ten fining-upward megacycles recorded in the lithofacies assemblages.
• Correlate observed lithofacies with the four interpreted depositional types (Scott, Donjek, South Saskatchewan braided river, and lacustrine).

Strengths

• Defines eight distinct lithofacies types with clear descriptions.
• Groups observations into four interpreted depositional assemblages for environmental analysis.
• Identifies at least ten fining-upward megacycles for stratigraphic sequence analysis.

Limitations

• Data is from a single year (1982) and may not reflect current geological conditions.
• Sample data and structured columns are unavailable, limiting quantitative analysis.
• Geographic coverage is limited to two specific areas in west-central Yukon.

Provenance

Source

Government of Yukon

Collection Method

Field geological survey and analysis.

Time Range

1982

Freshness

null

Geography

West-central Yukon, specifically Sixtymile River and Grayling Creek areas.