The same day I was up at Redwood looking for the bent trees, I ran across this fine example of a thrust fault right next to the Huckleberry Botanic Reserve.
Today I finally got around to putting it in my gallery at About.com—not as a thrust fault (I already have a good one), but as an example of a drag fold. Looks pretty good there, almost textbook quality. But here’s a secret: look at this view of the fault.
I can’t figure out what the double curvature means! I can’t figure out the relationship of the fault to the folds. I feel like a freshman in his first field course. A real geologist would crawl all over this, including the hillside on top, until everything was clear. But I tell myself, the key to being a good scientist is to admit when you’re mystified because enlightenment comes that way. A certain set of people can visualize things ten times as complicated, and I hope one of them will pipe up.
By the way, my spread about Oakland’s geology is in the new Oakbook, the printed one. Go get one for free.