Tally Ho Shear Zone Structural Evolution in Southern Yukon

A 3-km-wide belt of pyroxenite, gabbro, marble, and volcaniclastic rocks defines the Tally Ho shear zone along the western boundary of the Whitehorse Trough. Structural relations indicate the ultramafic rocks are allochthonous, thrust and folded in the Early Jurassic, with later faulting in the Late Cretaceous. This dataset is provided by the Government of Yukon under the OGL-CA-2.0 license.

Use Cases

• Analyze terrane boundary relationships based on the description of the Stikine Terrane and Nisling Assemblage separation.
• Model structural evolution based on described thrusting, folding, and subsequent brittle faulting events.
• Map lithological distributions based on the described belt of pyroxenite, gabbro, marble, and volcaniclastic rocks.
• Study the timing of geological events based on references to Early Jurassic folding and Late Cretaceous faulting.

Strengths

• Describes a specific 3-km-wide geological belt.
• Provides a clear temporal framework referencing Early Jurassic and Late Cretaceous events.
• Originates from an authoritative government source (Government of Yukon).

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Data may reflect geographic bias inherent to the Yukon region.

Provenance

Source

Government of Yukon

Time Range

Events described span from Early Jurassic to Late Cretaceous.

Freshness

Last updated 2026-04-17 16:04:01.371911; freshness should be verified.

Geography

Tally Ho shear zone, southern Yukon, along the western boundary of the Whitehorse Trough.