Curated OER
National Park Service: Mammoth Cave: Biology and Cave Life
This resource describes the biology and cave life of Mammoth Cave. Among the topics discussed are the animal and plant life associated with the area. Requires Adobe Reader. [PDF]
Science Education Resource Center at Carleton College
Serc: Investigating Karst Topography and Connection to Se Minnesota Sinkholes
In this field investigation, students will be able to observe, record, compare/contrast a variety of sinkholes located in the southeastern Minnesota area, including a significant one at the Harmony Karst Interpretive Site. The students...