Caves are delicate environments that are easily impacted by human visitation. Caves can contain delicate mineral formations that have taken millenia to form but that can be damaged or destroyed in a careless instant.
Caves also harbor a varied assemblage of organisms linked in a complex and sensitive ecosystem.
Click here to go to a site to see more similar images. In addition, I have done a number of regional studies on the occurrence of radon gas in cave systems, mostly in the western United States. Eventually I will post abstracts to papers that describe the results of these investigations. If you'd like to know more about the book and her work you can e-mail Linda directly with your questions. Before long I'll post more personal cave-related stuff.