Archive for November, 2008

Thanks, Oakland

27 November 2008

oakland panorama

On a gorgeous day two years ago (it was 11/29) I made a field trip to Corona Heights, across the bay in that other city, and shot this view of my home town. Soon I turned it into the banner image for this blog. I thought I’d offer a larger version—just click the photo for the 1600×835 size. It doesn’t get the whole city, only from Hiller Highlands down to Crestmont, but it gets the essence: green hills, wide lowlands, a handsome downtown, a busy harbor.

San Francisco is a fine place (it certainly has us beat for slickensides), but Oakland is where I’ve been happy to live for almost 20 years. I feel like I’m just getting to know it.

Thrust and fold

21 November 2008

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.

folds

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.

folds

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.


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