Take students on a guided geological tour of time -- We can see the markers of our own history every day: in old films and photographs, in museums, and in the ruins of ancient civilizations. -- But the Earth seems timeless, and changeless. The mountains have always been there as have the seas. Or so we might think. -- In this intriguing video, students are taken on a geologic tour of the area surrounding Boulder, Colorado in a search for clues to the constant changes that do occur over the vast span of geologic time. -- The informative narration provides a step-by-step survey of the cycles of deposition, deformation of crust and erosion, as well as explanations of horizontality and superimposition and how to interpret rock layers. 20 minutes. |
