Geologic Overview of a Bison-Carcass Site at Norris Geyser Basin, March 2004
http://www.npshistory.com/publications/yell/norris-bison-2004.pdf

Heasler Hank, Yellowstone National Park

This Yellowstone National Park report describes the conditions that apparently caused the death of five bison near the Norris Geyser Basin. The bison appear to have died from hydrogen sulfide and/or carbon dioxide emitted from nearby gas vents. This PDF file contains text, data, and photographs that explain the Park scientist's findings.

This resource is referenced here:

• Integrating Research and Education:Yellowstone: Is there a present volcanic hazard?
• Integrating Research and Education:Yellowstone: Human Impacts and Hazards
• Integrating Research and Education:Yellowstone: Geothermal Environments
• Integrating Research and Education:Yellowstone: Geobiology

Subject: Geoscience:Geology:Geochemistry
Resource Type: Scientific Resources:Research Results, Datasets and Tools:Datasets
Theme: Teach the Earth:Course Topics:Geochemistry
Focus on Yellowstone: Geothermal processes and features, Yellowstone hazards, Wildlife and plants