Time turned to stone, Part 1: Time as Interval

Good account of early geology and time

Primate's Progress

IMG_0138 The closing of Iapetus – the making of Scotland (from the Tapestry of Scotland)

I have recently visited two very different sites where time is turned to stone, where just looking at the rocks shows the passage of enormous lengths of time, dwarfing all of recorded human history. At the first site, the rocks I was looking at were ancient sediments, with the clearest possible evidence of prolonged interruption. In the second, they were comparatively (!) recent volcanic outpourings showing the traces of slow continuous change. In the first case I was looking at an 80,000,000 year gap in the record, in the second, at the signs of a hundred thousand years of continuous weathering. The first site is indicated by nothing more than a small information board behind a farm gate off a minor track, although it occupies a special position in the history of geology as a science. The second…

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