Our challenge was to find a way to illustrate geologic processes through historic and contemporary photos. The historic photos document 150 years of human interaction with a dynamic landscape with plenty of evidence of erosion and weathering of rocks.įor many years, rangers and lighthouse docents have successfully used a selection of historic photos during tours to illustrate aspects of Point Bonita’s history. The peninsula is exposed to occasional violent storms-landslides are common. The archives of Point Bonita are rich in historic photos, including some wonderful photographs taken by Eadweard Muybridge. This meant that the teaching tools we developed needed to be suitable for an outdoor program: inexpensive, portable (can fit into a day pack), durable, and able to withstand exposure to varying weather conditions. We needed to find a way to help students think about the processes of geologic change during their field program at Point Bonita in the Marin Headlands. Although this teaching tool was developed for the Rocks on the Move curriculum, Magic Windows could be used in a variety of disciplines in which time and landscape are components. The Magic Window technique can be part of an inquiry discussion in the classroom, outdoors, or in your neighborhood. The Magic Window helps you generate questions about how and why changes occur in the landscapes you view.
Using the Magic Window teaching tool facilitates a “hands-on” discussion of the essential question of our geology curricula: How do I recognize evidence of geologic change in my environment? Looking through the transparency, you can see two time periods simultaneously.
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