Grain size studies on turbidite components from Tyrrhenian deep sea cores
Through an analysis of their coarse-grain composition (>63 μm), pumice-rich sandy layers from deep sea cores were identified as shelf-derived turbidites rather than deposits due to ash rain or drifting pumice. A comparison of median sizes of individual grain types and total samples yielded signif...
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Blackwell
1973
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Online Access: | https://oceanrep.geomar.de/id/eprint/33660/ https://oceanrep.geomar.de/id/eprint/33660/1/Grain%20size.pdf https://doi.org/10.1111/j.1365-3091.1973.tb01620.x |
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ftoceanrep:oai:oceanrep.geomar.de:33660 2023-05-15T18:00:49+02:00 Grain size studies on turbidite components from Tyrrhenian deep sea cores Sarntheim, Michael Bartolini, C. 1973 text https://oceanrep.geomar.de/id/eprint/33660/ https://oceanrep.geomar.de/id/eprint/33660/1/Grain%20size.pdf https://doi.org/10.1111/j.1365-3091.1973.tb01620.x en eng Blackwell https://oceanrep.geomar.de/id/eprint/33660/1/Grain%20size.pdf Sarntheim, M. and Bartolini, C. (1973) Grain size studies on turbidite components from Tyrrhenian deep sea cores. Sedimentology, 20 (3). pp. 425-436. DOI 10.1111/j.1365-3091.1973.tb01620.x <https://doi.org/10.1111/j.1365-3091.1973.tb01620.x>. doi:10.1111/j.1365-3091.1973.tb01620.x info:eu-repo/semantics/restrictedAccess Article PeerReviewed 1973 ftoceanrep https://doi.org/10.1111/j.1365-3091.1973.tb01620.x 2023-04-07T15:27:11Z Through an analysis of their coarse-grain composition (>63 μm), pumice-rich sandy layers from deep sea cores were identified as shelf-derived turbidites rather than deposits due to ash rain or drifting pumice. A comparison of median sizes of individual grain types and total samples yielded significant vertical and horizontal sorting trends, which allowed apparently unrelated samples from different cores to be grouped into proximal and distal parts of one turbidite type. A discrimination of samples belonging to unrelated turbidite layers was also possible. In addition, whatever the grain size, planktonic molluscs and foraminifera have Md-diameters 1·1–2·75 times larger than those of pumice. Weathered shallow-water skeletals have Md-diameters approximately equal to pumice, whereas those of augite and hornblende are 1·25–2·3 times smaller. This results in a different proportion of components in proximal and distal turbidite samples. The Md-values of planktonic foraminifera reach their upper natural limit at 250–350 μm. Article in Journal/Newspaper Planktonic foraminifera OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Sedimentology 20 3 425 436 |
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Open Polar |
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OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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ftoceanrep |
language |
English |
description |
Through an analysis of their coarse-grain composition (>63 μm), pumice-rich sandy layers from deep sea cores were identified as shelf-derived turbidites rather than deposits due to ash rain or drifting pumice. A comparison of median sizes of individual grain types and total samples yielded significant vertical and horizontal sorting trends, which allowed apparently unrelated samples from different cores to be grouped into proximal and distal parts of one turbidite type. A discrimination of samples belonging to unrelated turbidite layers was also possible. In addition, whatever the grain size, planktonic molluscs and foraminifera have Md-diameters 1·1–2·75 times larger than those of pumice. Weathered shallow-water skeletals have Md-diameters approximately equal to pumice, whereas those of augite and hornblende are 1·25–2·3 times smaller. This results in a different proportion of components in proximal and distal turbidite samples. The Md-values of planktonic foraminifera reach their upper natural limit at 250–350 μm. |
format |
Article in Journal/Newspaper |
author |
Sarntheim, Michael Bartolini, C. |
spellingShingle |
Sarntheim, Michael Bartolini, C. Grain size studies on turbidite components from Tyrrhenian deep sea cores |
author_facet |
Sarntheim, Michael Bartolini, C. |
author_sort |
Sarntheim, Michael |
title |
Grain size studies on turbidite components from Tyrrhenian deep sea cores |
title_short |
Grain size studies on turbidite components from Tyrrhenian deep sea cores |
title_full |
Grain size studies on turbidite components from Tyrrhenian deep sea cores |
title_fullStr |
Grain size studies on turbidite components from Tyrrhenian deep sea cores |
title_full_unstemmed |
Grain size studies on turbidite components from Tyrrhenian deep sea cores |
title_sort |
grain size studies on turbidite components from tyrrhenian deep sea cores |
publisher |
Blackwell |
publishDate |
1973 |
url |
https://oceanrep.geomar.de/id/eprint/33660/ https://oceanrep.geomar.de/id/eprint/33660/1/Grain%20size.pdf https://doi.org/10.1111/j.1365-3091.1973.tb01620.x |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_relation |
https://oceanrep.geomar.de/id/eprint/33660/1/Grain%20size.pdf Sarntheim, M. and Bartolini, C. (1973) Grain size studies on turbidite components from Tyrrhenian deep sea cores. Sedimentology, 20 (3). pp. 425-436. DOI 10.1111/j.1365-3091.1973.tb01620.x <https://doi.org/10.1111/j.1365-3091.1973.tb01620.x>. doi:10.1111/j.1365-3091.1973.tb01620.x |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1111/j.1365-3091.1973.tb01620.x |
container_title |
Sedimentology |
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20 |
container_issue |
3 |
container_start_page |
425 |
op_container_end_page |
436 |
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1766170072269717504 |