The very first place which I examined, namely St. Jago in the Cape de Verde islands, showed me clearly the wonderful superiority of Lyell’ s manner of treating geology, compared with that of any other author whose works I had with me or ever afterwards read.” When Darwin had first studied geology, he had heard lectures in Wemerian neptunism at Edinburgh, and they had very nearly put him to sleep. Nevertheless, the degree he later took at zakelijke energie Cambridge University was in geology. He referred to himself as a geologist. His field identifications of the rocks he collected on his travels, and of the minerals within the rocks, were essentially without error. The rocks are in Cambridge, where contemporary geologists have thin-sectioned them, confirming Darwin’s petrology. Voyaging on the Beagle, he was enhancing his sense of the slow and repetitive cycles of the earth and the giddying depths of time, with Lyell’s book in his hand and Hutton’s theory in his head. In six thousand years, you could never grow wings on a reptile. With sixty million, however, you could have feathers, too.
According to present theory, many exotic terranes moved in from the western ocean and collected against North America during a span of about three hundred million years which ended roughly forty million years ago, increasing the continent to something like its present size. Three of these assembled at the latitude of Interstate 80. It was the first of these collisions that crunched and folded the wine-red sandstone near Carlin. The second, in the early Triassic, is what zakelijke energie vergelijken apparently caused the whole Carlin unconformity to revolve quite close to its present position. Sonomia, as the second terrane has been named, included much of what is now western Nevada and eastern California, and is said to have come into the continent with such force-notwithstanding that it was moving an inch or so a year-that it overlapped its predecessor by as much as eighty kilometres before it finally stopped. The evidence of this event is known locally as the Golconda Thrust, and both its upper and lower components are exposed in a big roadcut on the western flank of Golconda Summit, where the interstate, coming up out of Pumpernickel Valley, crosses a spur of the Sonoma Range. Small wonder that Deffeyes pulled over when we came to it and said, “Let’s stick our eyeballs on this one.”