Here you stand on a reef from the Devonian era, created around 380 million years ago today. At that time, the area of today's Eifel was much closer to the equator, and this reef formed at tropical temperatures in a lagoon in about 10 to 20 meters depth. Sunbeams penetrated to the bottom of the sea and made a reef of sponges grow (corals did not exist back then). The sponges have a skeleton of lime that has reacted with magnesium over the millennia - that's how dolomitic rocks were made. The volcano, whose crater is nearby (the Papenkaule), erupted much later, about 30,000 years before today. The lava flowed sideways out of the Dolmitberg into the valley of the Kyll. In the following audio file, the geo-scientist Andreas Schüller from the Geopark Vulkaneifel explains what it must have looked like 380 million years ago: soundcloud.com/zeitwissen/zeit-wissen-schueller-dolomiten (Internet connection required)
May 8, 2017
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