(Table 2) Radiocarbon dates and age calibration
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| Format: | Dataset Open Access |
| Langue: | en |
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PANGAEA
2010
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| _version_ | 1867170903326982144 |
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| author | Lantzsch, Hendrik Hanebuth, Till J J Bender, Vera Barbara |
| author_facet | Lantzsch, Hendrik Hanebuth, Till J J Bender, Vera Barbara |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | The high-energy, low-accumulation NW Iberian shelf features three confined Holocene mud depocentres. Here, we show that the evolution of such depocentres follows successive steps. The flooding of inner shelf zones and river catchment areas by the late deglacial sea-level rise provided the precondition for shelf mud deposition. Following this, the Holocene deceleration of the sea-level rise caused a rapid refill of the accommodation space within river valleys. Subsequently, the export of major amounts of fines was initiated. The initial onset and loci of shelf mud deposition were related to deposition-favouring conditions in mid-shelf position or to the presence of morphological highs, which act as sediment traps by providing protection against stronger hydrodynamic energy. The detailed reconstruction of the Holocene depocentre evolution shows for the first time that the expansion of such shelf mud deposits cannot only occur by linear growth off the associated sediment source. Rather, they might develop around centres that are fully disconnected from the source of original sediment supply, and expand later into specific directions. Based on these differences and on the connection of the individual mud depocentres to the material source we propose a conceptual subdivision of the group "mid-shelf mud depocentres". |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_738404 |
| institution | PANGAEA |
| language | en |
| publishDate | 2010 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | (Table 2) Radiocarbon dates and age calibration Lantzsch, Hendrik Hanebuth, Till J J Bender, Vera Barbara Age, 14C AMS; Age, comment; Age, dated; Age, dated, standard deviation; Age, dated material; Age, maximum/old; Age, minimum/young; Center for Marine Environmental Sciences; DEPTH, sediment/rock; Elevation of event; Event label; GeoB11002-3; GeoB11003-3; GeoB11010-2; GeoB11012-2; GeoB11017-2; GeoB11018-2; GeoB11028-2; GeoB11029-2; GeoB11030-2; GeoB11038-2; GeoB11039-2; GeoB13046-2; GeoB13047-2; Latitude of event; Longitude of event; MARUM; POS342; POS366/3; Poseidon; Sample, optional label/labor no; see comment; VC; Vibro corer The high-energy, low-accumulation NW Iberian shelf features three confined Holocene mud depocentres. Here, we show that the evolution of such depocentres follows successive steps. The flooding of inner shelf zones and river catchment areas by the late deglacial sea-level rise provided the precondition for shelf mud deposition. Following this, the Holocene deceleration of the sea-level rise caused a rapid refill of the accommodation space within river valleys. Subsequently, the export of major amounts of fines was initiated. The initial onset and loci of shelf mud deposition were related to deposition-favouring conditions in mid-shelf position or to the presence of morphological highs, which act as sediment traps by providing protection against stronger hydrodynamic energy. The detailed reconstruction of the Holocene depocentre evolution shows for the first time that the expansion of such shelf mud deposits cannot only occur by linear growth off the associated sediment source. Rather, they might develop around centres that are fully disconnected from the source of original sediment supply, and expand later into specific directions. Based on these differences and on the connection of the individual mud depocentres to the material source we propose a conceptual subdivision of the group "mid-shelf mud depocentres". |
| title | (Table 2) Radiocarbon dates and age calibration |
| topic | Age, 14C AMS; Age, comment; Age, dated; Age, dated, standard deviation; Age, dated material; Age, maximum/old; Age, minimum/young; Center for Marine Environmental Sciences; DEPTH, sediment/rock; Elevation of event; Event label; GeoB11002-3; GeoB11003-3; GeoB11010-2; GeoB11012-2; GeoB11017-2; GeoB11018-2; GeoB11028-2; GeoB11029-2; GeoB11030-2; GeoB11038-2; GeoB11039-2; GeoB13046-2; GeoB13047-2; Latitude of event; Longitude of event; MARUM; POS342; POS366/3; Poseidon; Sample, optional label/labor no; see comment; VC; Vibro corer |
| url | https://doi.org/10.1594/PANGAEA.738404 |