Marin Headlands Trip Index

2. Map to Trip Location

Walk uphill back toward Conzelman Rd. to first outcrop 
on the west (right) side.

3. The first outcrop

Walk up to the intersection with Conzelman Road.

4. A view of the entire sequence of rocks that we will be observing.

Turn left, and walk up Conzelman Road to first major roadcut on the right side.

As you proceed uphill, note the yellowish or buff colored character of soil that is found on
the interbedded sandstone and shales. The area up to and slightly beyond the Pacific
Coast Trail that crosses Conzelman Road is underlain by these types of rock

As we walk up hill we are going to be going down into older layers that lie beneath the
these layers.


5. Radiolarian Chert Outcrop
 

6. Chevron Folding in Chert at this outcrop

7. Rhythmic bedding in Chert

8. Jasper in Chert

9. Altered Basalt and Chert Contact

10. Jasper close-up

Walking a little further uphill we reach the oldest rocks in the
sequence here.
11. Pillow lava

Just a little further, don't quit now! We now start back
up in the sequence.

12. Back into the Chert with signs of black manganese coatings

Just around the corner.

13. Manganese layer in chert

Just across the street.

14. View of Golden Gate and Baker Beach


Proceed to Baker Beach portion of the field trip

Back to Index of Golden Gate field Trip