Yellowstone Resources and Issues
http://www.nps.gov/yell/planyourvisit/resourceandissues.htm

Yellowstone National Park


This Yellowstone National Park online book is a compendium of concise information about the park's history, natural and cultural resources, issues, and major areas. Chapters, which are downloadable as PDF files, focus on the history of the park, the yellowstone ecosystem, geology, life in extreme heat (as in the hot springs), vegetation, fire in yellowstone, wildlife, and park issues.

This resource is referenced here:
Subject: Biology, Geoscience:Geology:Structural Geology, Geochemistry, Geophysics
Resource Type: Scientific Resources:Overview/Reference Work, Audio/Visual:Maps
Topics: Earth surface, Solid Earth:Structural Geology, Geochemistry, Biosphere
Focus on Yellowstone: Volcanism, Yellowstone hazards, Wildlife and plants, GeomicrobiologyKeywords: Greater Yellowstone Ecosystem, thermophiles, vegetation, fire, wildlife