Explains the importance of index fossils for the dating and chronology of events in the fossil and geological records. Discusses uses and examples of index fossils in the Cenozoic, Mesozoic, and Paleozoic Eras.

This site provides information about the geologic relationships of rock layers, as well as much about geologic time and the history of Earth.

Uncover discoveries from the past by learning about the prehistoric Jefferson's ground sloth. Includes information about the time period, physical characteristics, fossil specimens, feeding habits, and habitat.

Uncover discoveries from the past by learning about the prehistoric North American scimitar cat. Includes information about the time period, physical characteristics, fossil specimens, feeding habits, and habitat.

Uncover discoveries from the past by learning about the prehistoric steppe bison. Includes information about the time period, physical characteristics, fossil specimens, feeding habits, and habitat.

Uncover discoveries from the past by learning about the prehistoric ancient caribou. Includes information about the time period, physical characteristics, fossil specimens, feeding habits, and habitat.

Uncover discoveries from the past by learning about the prehistoric Yukon horse. Includes information about the time period, physical characteristics, fossil specimens, feeding habits, and habitat.

Uncover discoveries from the past by learning about the prehistoric North American saiga. Includes information about the time period, physical characteristics, fossil specimens, feeding habits, and habitat.

Uncover discoveries from the past by learning about the prehistoric giant beaver. Includes information about the time period, physical characteristics, fossil specimens, feeding habits, and habitat.

Uncover discoveries from the past by learning about the prehistoric camels of the Yukon and Alaska. Includes information about the time period, physical characteristics, fossil specimens, feeding habits, and habitat.

Uncover discoveries from the past by learning about the prehistoric Beringian lion and the American lion that evolved from it. Includes information about the time period, physical characteristics, fossil specimens, feeding habits, and...

Students will be using live data about volcanoes and earthquakes to look for patterns and understand why natural disasters may or may not be able to be predicted. Resources include helpful websites, a video of the instructional activity...