Assembling California is the fourth volume of John McPhee’s geology tetralogy, the other volumes of which are Basin and Range, In Suspect Terrain, and Rising from the Plains. I delayed finishing the quartet because, as a California resident, I relished the enjoyment I would get from reading Assembling California. My only disappointment is that, being an Easterner, McPhee was mostly enthralled by Northern California, especially the area around I-80. Oh, well, it happens.
Assembling California is all about a fact that the geology, in its own way, replicates how the people of California came together from everywhere. So, too, did the pieces of rock that form the state migrate from all over the world and stick together—a process which will continue over millions of years to take the start apart just as it put it all together. Geologist Eldridge Moores writes:
People look upon the natural world as if all motions of the past had set the stage for us and were now frozen. They look out at a scene like this and think, It was all made for us—even if the San Andreas Fault is at their feet. To imagine that turmoil is in the past and somehow we are now in a more stable time seems to be a psychological need. Leonardo Seebler, of Lamont-Doherty, referred to it as the principle of least astonishment. As we have seen this fall, the time we’re in is just as active as the past. The time between events is long only with respect to a human lifetime.
I, for one, have been through two major quakes—the Sylmar Quake of 1971 and the North Hills Quake of 1994.
There are times when I stop and listen, waiting for the earth to rise up again and send me into paroxysms of terror. Whether I live or die will depend if “I am in the right place at the right time.” I can pretend that I will never experience another earthquake, but the chances are good that I will.