Distal records of Katla’s explosive past: Ocean-rafted pumice in raised shorelines on Varanger Peninsula, Northern Norway ...
<!--!introduction!--> Ocean-rafted pumice is found on modern and paleo-beaches across the North Atlantic and elsewhere. While not as accurate as tephrochronology, ocean-rafting events can be fingerprinted to their volcanic source and used to date sedimentary records and landforms, including ra...
Main Authors: | , , , |
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Format: | Conference Object |
Language: | unknown |
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GFZ German Research Centre for Geosciences
2023
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Online Access: | https://dx.doi.org/10.57757/iugg23-2157 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5018693 |
Summary: | <!--!introduction!--> Ocean-rafted pumice is found on modern and paleo-beaches across the North Atlantic and elsewhere. While not as accurate as tephrochronology, ocean-rafting events can be fingerprinted to their volcanic source and used to date sedimentary records and landforms, including raised shorelines. They also provide records of large explosive eruptions that might not be preserved near the volcano due to extensive erosion or a submarine volcanic source and as such can be used for petrological and geochemical investigations. Our study focuses on the Varanger Peninsula in Norway in order to establish a detailed distal record of large silicic eruptions from Katla Volcanic Centre in Iceland. Here, strong Holocene uplift rates and sea-level changes have built a unique succession of fossil beaches up to the marine limit that are covered in little vegetation. We found that pumice was abundant on specific paleo-shorelines and in defined geomorphic settings but absent from older beach ridges, with the ... : The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) ... |
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