Saharan dust transported Quartz grains in sediment cores GIK13289-1/-2 and GIK13291-1, off Senegal (NW Africa) ...
Two deep-sea cores, GIK13891 and GIK13291, retrieved off Mauretania (NW Africa) from the top of a ca. 250 m high seamount and from the seamount's foot were studied. Planktonic foraminifera oxygen isotope records in conjunction with 14C ages in the upper core sections were used to establish a st...
| Main Authors: | , |
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| Format: | Article in Journal/Newspaper |
| Language: | English |
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PANGAEA
2020
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| Subjects: | |
| Online Access: | https://dx.doi.org/10.1594/pangaea.922474 https://doi.pangaea.de/10.1594/PANGAEA.922474 |
| Summary: | Two deep-sea cores, GIK13891 and GIK13291, retrieved off Mauretania (NW Africa) from the top of a ca. 250 m high seamount and from the seamount's foot were studied. Planktonic foraminifera oxygen isotope records in conjunction with 14C ages in the upper core sections were used to establish a stratigraphy. Sedimentological studies of both cores focused on the occurrence and abundance of giant grains of up to 1500 µm. Three possible transport ways for those giant grains are being discussed:a) transport by turbidity currentsb) erosion from the seamount topc) eolian delivery.The sedimentological results, including SEM pictures, point mainly to erosion and additional eolian delivery of the giant grains. ... |
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