Episode 3 of 4
Hayden Geological Survey
- When
- 1871
- Where
- Yellowstone area
Government-sponsored survey producing comprehensive reports and visual documentation.
In 1871, the Hayden Geological Survey produced a comprehensive report including photographs by William Henry Jackson and paintings by Thomas Moran, supporting the case for preservation.
Sources
- Yellowstone National Park Wikipedia, revision of 2026-10-06
Machine-drafted from the cited Wikipedia passages and checked by a reviewing model, not by a human editor. Every passage cites the revision it was written from; dates and places follow those passages.