Intense hurricane transports sand onshore: Example from the Pliocene Malbusca section on Santa Maria Island (Azores, Portugal)
Southern cliffs on Santa Maria Island in the Azores archipelago (North Atlantic Ocean) feature submarine volcanic sequences inter-bedded with Pliocene coralline algal limestone, shelly coquinas, and mixed volcaniclastic-calcarenite sandstone. Within the 20-m sedimentary succession at Malbusca, a sin...
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Online Access: | https://orca.cardiff.ac.uk/id/eprint/142098/ https://doi.org/10.1016/j.margeo.2017.02.002 |
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ftunivcardiff:oai:https://orca.cardiff.ac.uk:142098 2023-05-15T17:33:41+02:00 Intense hurricane transports sand onshore: Example from the Pliocene Malbusca section on Santa Maria Island (Azores, Portugal) Johnson, Markes E. Uchman, Alfred Costa, Pedro J. M. Ramalho, Ricardo S. Avila, Sergio P. 2017-03-01 https://orca.cardiff.ac.uk/id/eprint/142098/ https://doi.org/10.1016/j.margeo.2017.02.002 unknown Elsevier Johnson, Markes E., Uchman, Alfred, Costa, Pedro J. M., Ramalho, Ricardo S. https://orca.cardiff.ac.uk/view/cardiffauthors/A26521485.html and Avila, Sergio P. 2017. Intense hurricane transports sand onshore: Example from the Pliocene Malbusca section on Santa Maria Island (Azores, Portugal). Marine Geology 385 , pp. 244-249. 10.1016/j.margeo.2017.02.002 https://doi.org/10.1016/j.margeo.2017.02.002 doi:10.1016/j.margeo.2017.02.002 Article PeerReviewed 2017 ftunivcardiff https://doi.org/10.1016/j.margeo.2017.02.002 2022-09-25T21:18:35Z Southern cliffs on Santa Maria Island in the Azores archipelago (North Atlantic Ocean) feature submarine volcanic sequences inter-bedded with Pliocene coralline algal limestone, shelly coquinas, and mixed volcaniclastic-calcarenite sandstone. Within the 20-m sedimentary succession at Malbusca, a singular, 5-m sandstone bed is distinguished by dark and light laminae dominated alternately by heavy minerals and carbonate detritus. Carbonate grain-size varies between that of coarse silt and very fine sand. The basal part shows coarser and more poorly sorted sand in an upward transition to increasingly finer carbonates. Accessible over a lateral space of 34 m, the big bed is shouldered against and overlaps the remnants of a drowned rocky shore with a paleorelief of 4 m that preserves intertidal to shallow subtidal biotas. Extrapolated from the big bed's rock face (1830 m2) and the width of the eroded shelf on which it resides (8 m), calculations yield a projected volume of 14,500 m3. Unique to the island, the big bed is interpreted as a major hurricane deposit that moved sand from an offshore bar in an onshore path. Such an event fits the context of the Pliocene Warm Period, during which global El Niño conditions were more intense than today. Article in Journal/Newspaper North Atlantic Cardiff University: ORCA (Online Research @ Cardiff) Maria Island ENVELOPE(-55.914,-55.914,51.232,51.232) Marine Geology 385 244 249 |
institution |
Open Polar |
collection |
Cardiff University: ORCA (Online Research @ Cardiff) |
op_collection_id |
ftunivcardiff |
language |
unknown |
description |
Southern cliffs on Santa Maria Island in the Azores archipelago (North Atlantic Ocean) feature submarine volcanic sequences inter-bedded with Pliocene coralline algal limestone, shelly coquinas, and mixed volcaniclastic-calcarenite sandstone. Within the 20-m sedimentary succession at Malbusca, a singular, 5-m sandstone bed is distinguished by dark and light laminae dominated alternately by heavy minerals and carbonate detritus. Carbonate grain-size varies between that of coarse silt and very fine sand. The basal part shows coarser and more poorly sorted sand in an upward transition to increasingly finer carbonates. Accessible over a lateral space of 34 m, the big bed is shouldered against and overlaps the remnants of a drowned rocky shore with a paleorelief of 4 m that preserves intertidal to shallow subtidal biotas. Extrapolated from the big bed's rock face (1830 m2) and the width of the eroded shelf on which it resides (8 m), calculations yield a projected volume of 14,500 m3. Unique to the island, the big bed is interpreted as a major hurricane deposit that moved sand from an offshore bar in an onshore path. Such an event fits the context of the Pliocene Warm Period, during which global El Niño conditions were more intense than today. |
format |
Article in Journal/Newspaper |
author |
Johnson, Markes E. Uchman, Alfred Costa, Pedro J. M. Ramalho, Ricardo S. Avila, Sergio P. |
spellingShingle |
Johnson, Markes E. Uchman, Alfred Costa, Pedro J. M. Ramalho, Ricardo S. Avila, Sergio P. Intense hurricane transports sand onshore: Example from the Pliocene Malbusca section on Santa Maria Island (Azores, Portugal) |
author_facet |
Johnson, Markes E. Uchman, Alfred Costa, Pedro J. M. Ramalho, Ricardo S. Avila, Sergio P. |
author_sort |
Johnson, Markes E. |
title |
Intense hurricane transports sand onshore: Example from the Pliocene Malbusca section on Santa Maria Island (Azores, Portugal) |
title_short |
Intense hurricane transports sand onshore: Example from the Pliocene Malbusca section on Santa Maria Island (Azores, Portugal) |
title_full |
Intense hurricane transports sand onshore: Example from the Pliocene Malbusca section on Santa Maria Island (Azores, Portugal) |
title_fullStr |
Intense hurricane transports sand onshore: Example from the Pliocene Malbusca section on Santa Maria Island (Azores, Portugal) |
title_full_unstemmed |
Intense hurricane transports sand onshore: Example from the Pliocene Malbusca section on Santa Maria Island (Azores, Portugal) |
title_sort |
intense hurricane transports sand onshore: example from the pliocene malbusca section on santa maria island (azores, portugal) |
publisher |
Elsevier |
publishDate |
2017 |
url |
https://orca.cardiff.ac.uk/id/eprint/142098/ https://doi.org/10.1016/j.margeo.2017.02.002 |
long_lat |
ENVELOPE(-55.914,-55.914,51.232,51.232) |
geographic |
Maria Island |
geographic_facet |
Maria Island |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
Johnson, Markes E., Uchman, Alfred, Costa, Pedro J. M., Ramalho, Ricardo S. https://orca.cardiff.ac.uk/view/cardiffauthors/A26521485.html and Avila, Sergio P. 2017. Intense hurricane transports sand onshore: Example from the Pliocene Malbusca section on Santa Maria Island (Azores, Portugal). Marine Geology 385 , pp. 244-249. 10.1016/j.margeo.2017.02.002 https://doi.org/10.1016/j.margeo.2017.02.002 doi:10.1016/j.margeo.2017.02.002 |
op_doi |
https://doi.org/10.1016/j.margeo.2017.02.002 |
container_title |
Marine Geology |
container_volume |
385 |
container_start_page |
244 |
op_container_end_page |
249 |
_version_ |
1766132256793952256 |