Documentation of a unique site in Wales

More than a century ago, English geologist Edward Greenly described a specific sequence of rocks on the island of Anglesey in Wales, which he called "Mélange" after the French word for a mixture. Mélange is formed in the so-called accretionary wedges – that is, where lithospheric plates slide one beneath another (subduction zones). A team of geologists of the Faculty of Science, Charles University and the Institute of Geology of the Czech Academy of Sciences visited the site this year for sampling and subsequent analysis. Dating of zircons by the U-Pb method and the analysis of radiogenic isotopes Sr, Nd, Hf will help to refine our knowledge of the processes in the unique environment of subduction zones anywhere in the world.