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Nature attractions in Porsgrunn
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As the first geopark in Scandinavia, Gea Norvegica became member of the Global Geoparks Network/European Geoparks Network in 2006.
South of Porsgrunn, across Frierfjorden and further into Bamble by Herre, there is an extensive fault, the results of a period of earthquakes about 300 million years ago.
Bamble is dominated by two types of landscape with completely different geological histories. In the west the landscape is dominated by ancient basement bedrock, whereas limestone's are characteristic further east from the peninsula of Langesundsøya.