• View of the Golden Gate Bridge, taken from the Marin Headlands, looking across the bay back towards San Francisco, seen in the distance.

    Golden Gate

    National Recreation Area California

Cookie Tectonics

Cookie tectonic demonstration

Ranger Roxi demonstrates Cookie Tectonics to teacher candidates.

Cookie Tectonics uses a sandwich cookie to offer a fun and easy way to model the geologic assembling of the Franciscan Complex rocks, during the subduction and accretion of the ancient Farallon Plate.

  • Download the Cookie Tectonics lesson plan in:

Did You Know?

Photo of gull chicks breaking our of an egg in a nest.

After incubation lasting four weeks, a gull chick breaks out of its egg without assistance from its parents. At hatching, the chick is fully covered with down and is soon able to open its eyes and stand up to walk about the nest.