David and Janet Carle were state park rangers at Mono Lake Tufa State Reserve for twenty years and have taught at Cerro Coso Community College in Mammoth Lakes. Janet is the editor of the California State Park Rangers Association journal, The Wave. David is the author of numerous books including Introduction to Earth, Soil and Land in California, Introduction to Water in California, Introduction to Fire in California, and Introduction to Air in California (all by UC Press).