This week, an email was sent to everyone in my office, inviting us to come and see the trenches that Kate Scharer has been working in on the San Andreas Fault. The location was near Lake Elizabeth, a bit north of Los Angeles. This is the southern end of the Carrizo Plain segment of the fault. So a group of us made arrangements to go up there for the morning.
The route up there went up San Francisquito Canyon. That was the site of the Bouquet Canyon Road Race in 1978, which I’ve long regarded as the single most miserable day I’ve ever spent on my bike. And it was also the site of the St Francis Dam disaster, which is an interesting bit of local history.
It was a nice day, but kind of windy up there on the fault line. Kate had her dogs with her, and they were running around, trying to get us to play with them. That, and they also like to go down into the trench to lie down on the cool dirt at the bottom. Kate took us on a tour of both trenches, pointing out the layers and where they were broken by past earthquakes. She showed us where the breaks could be traced from one trench to another. She also pointed out ancient animal burrows and worm holes.
After the trench tour, we took a walk up to the top of a small rise near the trench site. From there, we could take in a full 180-degree view of the fault zone.
On the way home, we stopped briefly at the site of the former St Francis dam, just to marvel at how big is was, and to try and imagine what it was like when it all came crashing down.
It made for an interesting morning.