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  • Inside a fault

    In September, Klaus and me lead a MSc student excursion to southwestern Germany. We not only went through the entire stratigraphy of that area (mainly Triassic and Jura), but also visited the salt mine in Stetten, quarries in Dotternhausen (opalinus clay, posidonia schist, Malm), the Kaiserstuhl carbonatite volcano complex and the Upper Rhine Graben area. One of my personal highlights was the Freudenstädter Graben, a small tectonic graben striking NW-SE, whose NE main fault is exposed in an old mine in Hallwangen. more

  • Thursday Geology Picture: Iron-nickel mine in Albania

    I took this picture in an iron-nickel mine in Albania. Here we see the contact between the underlying ultramafics and the carbonates on top. The fluids circulated in the mafics and the iron-nickel ores are trapped at the lithological boundary. The ore is shiny green and occurs in hundreds of small bands in a small area along the contact only. I love this picture because the contact is so sharp. A fault zone nearby bears very beautiful conglomerates which I always wanted to have for my bathroom…

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