At various times in a span of fifteen years, John McPhee has made geological field trips in the company of Eldridge Moores, a tectonicist at the University of California at Davis. The result is Assembling California, a cross-section in human and geologic time, from Donner Pass in the Sierra Nevada through the golden foothills of the Mother Lode and across the Great Central Valley to the wine country of the Coast Ranges, the rock of San Francisco, and the San Andreas family of faults. The two disparate time scales occasionally intersect - in the gold disruptions of the nineteenth century no less than in the earthquakes of the twentieth - and always with relevance to a newly understood geologic history in which half a dozen large and separate pieces of country are seen to have drifted in from far and near to coalesce as California. McPhee and Moores also journeyed to remote mountains of Arizona (where Moores grew up in a gold-mining camp), and to Cyprus and northern Greece, where rock of the deep-ocean floor has been transported into continental settings, as it has | Assembling California by John McPhee, Paperback | Indigo Chapters