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| dc.contributor | Universitat de Barcelona |
|---|---|
| dc.contributor.author | Sáez, Alberto |
| dc.contributor.author | Carballeira, R. |
| dc.contributor.author | Pueyo Mur, Juan José |
| dc.contributor.author | Vázquez-Loureiro, D. |
| dc.contributor.author | Leira, M. |
| dc.contributor.author | Hernández Hernández, Armand |
| dc.contributor.author | Valero Garcés, Blas Lorenzo |
| dc.contributor.author | Bao Casal, Roberto |
| dc.date | 2018-09-26T10:07:02Z |
| dc.date | 2019-10-31T06:10:12Z |
| dc.date | 2018-10 |
| dc.date | 2018-09-26T10:07:02Z |
| dc.identifier.citation | 0037-0746 |
| dc.identifier.citation | 674443 |
| dc.identifier.uri | http://hdl.handle.net/2445/124827 |
| dc.description.abstract | Coastal back-barrier perched lakes are freshwater bodies that are elevated over sea-level and are not directly subjected to the inflow of sea-water. This study provides a detailed reconstruction of the Doniños back-barrier perched lake that developed at the end of a small river valley in the rocky coast of the northwest Iberian Peninsula during the Holocene transgression. Its sequence stratigraphy was reconstructed based on a core transect across the system, the analyses of its lithofacies and microfossil assemblages, and a high-resolution radiocarbon-based chronology. The Doniños perched lake was formed ca. 4.5 ka BP. The setting of the perched lake was favoured by Late Holocene sea-level stabilization and the formation of a barrier and back-barrier basin, which was contemporaneous with the high systems tract period. This basin developed over marine and lagoonal sediments deposited between 10.2 and 8.0 ka BP, during rapidly rising sea-level characteristic of the transgressive systems track period. At 1.1 ka BP, the barrier was breached and the perched lake was partially emptied, causing the erosion of the back-barrier basin sediments and a significant sedimentary hiatus. Both enhanced storminess and human intervention were likely responsible for this event. After 1 ka BP, the barrier reclosed and the present-day lake was reformed, with the water level reaching as high as 5 m amsl. The depositional evolution of the Doniños system serves as a model of coastal back-barrier perched lakes in coastal clastic systems that have developed over gently seaward-dipping rugged substrates at small distances from the shoreline and under conditions of rising sea-level and high sediment supply. A review of estuaries, back-barrier lagoons, pocket beaches and back-barrier perched lakes in the rocky coast of the northwest Spain shows that the elevation of the bedrock is the main factor controlling the origin and evolution of these systems. |
| dc.format | 51 p. |
| dc.format | application/pdf |
| dc.language.iso | eng |
| dc.publisher | International Association of Sedimentologists |
| dc.relation | Versió postprint del document publicat a: https://doi.org/10.1111/sed.12451 |
| dc.relation | Sedimentology, 2018, vol. 65, num. 6, p. 1891-1917 |
| dc.relation | https://doi.org/10.1111/sed.12451 |
| dc.rights | (c) Sáez, Alberto et al., 2018 |
| dc.rights | info:eu-repo/semantics/openAccess |
| dc.subject | Holocè |
| dc.subject | Sedimentologia |
| dc.subject | Nivell del mar |
| dc.subject | Estratigrafia |
| dc.subject | Holocene |
| dc.subject | Sedimentology |
| dc.subject | Sea level |
| dc.subject | Stratigraphic geology |
| dc.title | Formation and evolution of back-barrier perched lakes in rocky coasts: an example of a Holocene system in NW Spain |
| dc.type | info:eu-repo/semantics/article |
| dc.type | info:eu-repo/semantics/acceptedVersion |
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