Lesson plan
Ignacio Formation
The Ignacio Formation (Ingacio Quartzite) is a geologic formation that crops out in the San Juan Mountains of southwestern Colorado. Long thought to be Cambrian in age, the formation is now thought to be upper Devonian in age, based on detrital zircon geochronology and other evidence.
Article summary
The Ignacio Formation (Ingacio Quartzite) is a geologic formation that crops out in the San Juan Mountains of southwestern Colorado. Long thought to be Cambrian in age, the formation is now thought to be upper Devonian in age, based on detrital zircon geochronology and other evidence.
Key claims
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Discussion questions
- Summarise the article in your own words. Which single claim would you verify first, and why?
- Which claim in this article is most likely to be revised as the sources update? How would you check its current status?
- If two sources disagreed about one of these facts, what would you need in order to trust one over the other?
Bibliography
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Key claims and bibliography are generated from the same tracked claims and sources as the article page.