Geological observations document the contact between Paleozoic platformal and basinal strata of the Cassiar Terrane and rocks of the Yukon-Tanana Terrane southeast of Little Salmon Lake. The dataset likely contains descriptions of rock types, structural features, and intrusions along an unexposed fault boundary. The Government of Yukon published this information, last updated on April 17, 2026.
Use Cases
- Map terrane boundary structures based on descriptions of fault-related mylonite and cataclasis.
- Analyze rock unit distributions based on descriptions of quartzite, marble, phyllite, and amphibolite groupings.
- Study intrusive relationships based on mentions of the Glenlyon batholith and andesite dykes.
- Correlate magnetic anomalies with geological features based on the mention of a positive magnetic anomaly parallel to the fault.
Strengths
- Description provides specific geological features like two mylonite localities and evidence of brittle cataclasis up to 1 km.
- Identifies distinct rock suites for each terrane, including mafic volcaniclastic rocks, quartz-feldspar grit, and metasiltstone.
- Last updated date is explicitly provided: 2026-04-17 15:54:25.674852.
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 specific study area in south-central Yukon.
Provenance
- Source
- Government of Yukon
- Freshness
- Last updated 2026-04-17 15:54:25.674852; freshness should be verified.
- Geography
- Contact between Yukon-Tanana and Cassiar terranes, southeast of Little Salmon Lake (105L/1), south-central Yukon