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.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 |
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. |