This close-up of tree rings illustrates how annual tree growth varies. Analysis of closely packed rings in rimu trees near the Alpine Fault has shown that tree growth was poor in particular years: 1210 CE, 1445, 1580 and 1717. Major earthquakes in those years may have arrested the trees’ development.
Te whakamahi i tēnei tūemi
Department of Geology, University of Otago
Photograph by Craig Wright
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