• View of the Golden Gate Bridge, taken from the Marin Headlands, looking towards San Francisco at sunrise.

    Golden Gate

    National Recreation Area California

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  • Tunnel Closure

    The Barry/Baker tunnel on Bunker Road will be closed for maintenance during the weeks of 6/2 and 6/9. The tunnel will be open on the weekends. Please use Conzelman Road instead. More »

  • Muir Beach Overlook closure

    The Muir Beach Overlook will be closed for Accessibility improvements and trail upgrades from June 2 through July 21. Alternate viewpoints are available along Highway 1 between there and Stinson Beach.

Rocks on the Move at Rodeo Lagoon

View of the Pacific Ocean, Rodeo Lagoon and barrier beach from the lagoon trail

Rodeo Lagoon and barrier beach

NPS Suzanne Garcia

How do we recognize geologic change in our environment?

How do humans influence these changes?

During Rocks on the Move at Rodeo Lagoon: Tracking the Human Footprint, students use historic photgraphs and depictions of the ancient past to collaboratively develop a map showing the degree of human impact (a Human Footprint map) in the Rodeo Lagoon area of the Marin Headlands.

 
Students take a close look at the Rainbow Sands of Rodeo Beach

Students take a close look at the rainbow sands of Rodeo Beach

Tung Chee, GGNPC

Guided inquiry, small group discussions and journaling enable students to gain an increased awareness of the natural processes and human influences that have shaped this lagoon system, and how the geologic history of the Bay Area is revealed in the rainbow-colored beach sands of Rodeo Beach.

Using our Magic Window teaching tool, students view the Rodeo Lagoon landscape at different points in time. As they make observations and generate questions about the changes they see, they consider whether these changes are the result of geologic processes or human impacts.

 
Student identifying the pebbles on Rodeo Beach

Learning about the pebbles on Rodeo Beach

Tung Chee, GGNPC

Teachers participating in our Rocks on the Move programs have access to an online curriculum and a traveling trunk of classroom materials and Franciscan Complex rock samples that help bring local geology alive. Throughout all portions of the Rocks on the Move experience, students learn how to recognize geologic changes in their environments. Park staff offer a classroom presentation prior to your visit to the Marin Headlands, to familiarize students with the physical characteristics of the Franciscan rocks though our Edible Geology lesson, and the use of a dichotomous key to identify rock samples. A similar key is used during the field program while students choose their favorite Rodeo Beach pebbles to investigate.
 

Visit the web pages and lessons listed below to view more:

Did You Know?

Basalt pillows

Geologists sometimes call Franciscan pillow basalt “greenstone” because it contains green minerals formed in an interaction between the basalt and hot, mineral-rich seawater.