Like other structural geologists of my generation, I remember the intense frustration on discovering, in the early 1960s, that the laborious weeks spent in plotting hundreds of quartz and mica c-axis measurements with the universal stage had been a complete waste of time, and told me nothing that was not already obvious from the minor structures in the field. By then it had become obvious from the work of John Ramsay and others that the recording of structural geometry in the field was the only reliable method of analysing the structure of complex metamorphic belts. We now accepted (with...

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