The role of antecedent morphology and changing sediment sources in the postglacial palaeogeographical evolution of an incised valley: The sedimentary record of the Ría de Arousa (NW Iberia)

Cartelle, Víctor; García-Moreiras, Iria; Martínez-Carreño, Natalia; Sobrino, Castor Muñoz; García‐Gil, Soledad

doi:10.1016/j.gloplacha.2021.103727

Cited by 10 publications

(4 citation statements)

References 111 publications

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“…6), reflecting the reworking of older deposits stored in temporal sinks due to the intensified sediment erosion in the catchment. This corresponds to the sediment cascade model (Lang and Hönscheidt, 1999), which has been reported in other studies in the Mediterranean region (Vita-Finzi, 1969; van Andel et al, 1990; Nykamp et al, 2021; Cartelle et al, 2022).…”

Section: Mid- To Late Holocene Geomorphodynamicssupporting

confidence: 77%

Mid- to Late Holocene geomorphodynamics in a long-term settled mountain catchment in the Pergamon micro-region, western Turkey

et al. 2023

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From 300 BC to AD 300, the city of Pergamon underwent a profound transformation that impacted the rural settlement patterns and the concomitant geomorphodynamics. We present a geoarchaeological study in a long-term settled catchment in the Pergamon micro-region to disentangle the Holocene geomorphodynamics and triggering factors, for example, climate change and human activity. The analyses of eight radiocarbon-dated sediment profiles from the Tekkedere alluvial fan and its catchment indicate four principal sedimentation phases. Phase 1 (ca. 6.2 to 5–4 ka) is dominated by the floodplain aggradation of the receiving Bakırçay River, which is followed by the formation of floodplain soils (phase 2). Substantial geomorphodynamic changes occurred around 4 ka (phase 3), when the edge of the floodplain was buried by fan sediments of the tributary Tekkedere creek. This is attributed to supraregional aridization and rapid climate change events, superimposed by the onset of local human activities. Repeated cycles of coarse- and fine-textured fan sediments with age inversions after ca. 3.8 ka and valley infills younger than 1300 yr BP indicate the strong erosion and redeposition of sediments in phase 4. These increased geomorphodynamics may coincide with the changing settlement pattern and thus reflect human–environment interactions.

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Section: Mid- To Late Holocene Geomorphodynamicssupporting

confidence: 77%

Mid- to Late Holocene geomorphodynamics in a long-term settled mountain catchment in the Pergamon micro-region, western Turkey

et al. 2023

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“…Moreover, the sea-level would be lower than −38 m (bpsl) 3.4 ky ago on the basis of the chronological data [28], both the age and the depth of the uppermost level at lee-side dune (Figure 8c). This type of flooded aeolian formation can also be observed on the nearby Ons Islands (see the same transect PT7 in [86][87][88]) and Sálvora Island (see Figure 13c in [11]), developing a similar topographic and sedimentary structure-although they have not been mentioned until now. These sands would later be transported by the wind, covering the eastern leeward side of these islands (more sheltered from the strong coastal winds) and also reaching the current coastline of the Ria de Vigo (Figure 10), as will be explained later.…”

Section: Flooded Dunes In the Cies Islands And Sea-levelsupporting

confidence: 55%

“…Until now, the knowledge of sediments both inside the rias and on the continental shelf were based on high-resolution seismic-reflection profiles, complemented with deep-core or vibrocorer drillings [7][8][9][10][11][12], in which micropalaeontological studies were not performed. On the other hand, the chronology of the proposed sedimentary units was based on scarce radiocarbon dating of organic remains assuming only a few suspected Pleistocene fluvial sediments.…”

Section: Introductionmentioning

confidence: 99%

“…In this sense, these infills in the Ria de Vigo would be positively related to the nearest fluvial deposits in the basin of the lower Miño River (Pontevedra) (inset in Figure 1) dated by optically stimulated luminescence (OSL) and ascribed to the Upper Quaternary [1], as similar sediments of continental origin dated in the coast of Galicia and northern Portugal [15][16][17][18][19], although none of these data have been considered in previous assumptions. Until now, the knowledge of sediments both inside the rias and on the continental shelf were based on high-resolution seismic-reflection profiles, complemented with deep-core or vibrocorer drillings [7][8][9][10][11][12], in which micropalaeontological studies were not performed. On the other hand, the chronology of the proposed sedimentary units was based on scarce radiocarbon dating of organic remains assuming only a few suspected Pleistocene fluvial sediments.…”

Section: Introductionmentioning

confidence: 99%

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New Model of Coastal Evolution in the Ria de Vigo (NW Spain) from MIS2 to Present Day Based on the Aeolian Sedimentary Record

Chamorro

Romaní

Sánchez

2022

JMSE

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Galician Rias are fluvial valleys that were flooded during the last marine transgression in the Atlantic margin. The study of fossil dunes in the Cies Islands, a small archipelago in the mouth of the one of the rias (Ria de Vigo), allowed us to reconstruct the coastal evolution from the end of the Late Pleistocene to the present day. During this period, sea-level was 100 metres below the present one and the shoreline located about 5–10 kilometres away. About 15,000 years ago, sea-level rise began, radically modifying the coastline. This started with a gradual advance of large dune fields on both sides of the valley. The aeolian accretion continued until the Late Holocene, finishing when the sea reached its present level.

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Sea-level change and human occupation over 6000 years on Areoso Island (Ría de Arousa, NW Iberian Peninsula)

et al. 2023

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Coastal areas are extremely sensitive to variations in environmental conditions. The interaction of marine and continental processes causes a high degree of dynamism, generating depositional formations of great value for palaeoenvironmental reconstruction. This paper focuses on two pedostratigraphic deposits located under the current beach, in close proximity to archaeological tumuli located on Areoso Island (Ría de Arousa, NW Iberian Peninsula). Employing a geoarchaeological approach, sea-level rise, environmental conditions and human occupation over a 6000-year period are interpreted. The results of granulometric and mineralogical data, elemental composition and stratigraphic features, help to identify three successive environments: continental (rock weathering, soil formation and erosion); a transition to a coastal environment; and the establishment of full coastal conditions. The geomorphological evolution of the last 6.0 kyr BP has been controlled by climate, sea-level rise and human activity. The continental facies shows evidence of low sea-level up to 4.8 kyr BP and the first evidence of coastal processes after 3.2 kyr BP. These pedostratigraphic deposits located in an open coastal system improve the Holocene sea-level rise curve in the NW Iberian Peninsula and help to understand the context in which the most important archaeological structures on the island (the tumuli) began to be eroded.

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The role of antecedent morphology and changing sediment sources in the postglacial palaeogeographical evolution of an incised valley: The sedimentary record of the Ría de Arousa (NW Iberia)

Cited by 10 publications

References 111 publications

Mid- to Late Holocene geomorphodynamics in a long-term settled mountain catchment in the Pergamon micro-region, western Turkey

Mid- to Late Holocene geomorphodynamics in a long-term settled mountain catchment in the Pergamon micro-region, western Turkey

New Model of Coastal Evolution in the Ria de Vigo (NW Spain) from MIS2 to Present Day Based on the Aeolian Sedimentary Record

Sea-level change and human occupation over 6000 years on Areoso Island (Ría de Arousa, NW Iberian Peninsula)

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