Stratigraphic, morphologic and radiocarbon data from Puerto Deseado coastal area (Santa Cruz Province, Argentina) indicate that the Holocene coastline formed in response to the discontinuous aggradation of coarse gravely beaches since c. 6300 cal. yr BP related to a progressive falling of relative sea level. Beach ridge crests crudely approximate to the sea level showing at least three steps of aggradation and relative sea-level lowering. Two inactive abrasive notches at c. 7.9 and 3.4 m a.s.l. have recorded this sea-level trend, suggesting two important phases when sea level was stationary. This allows the estimation of a rate of relative sea-level fall in the last c. 3500 years of c. 1.8 mm/yr. Moreover, notches and morphological data indicate that the crest of the beach ridges exceeded the sea-level height by c. 2 ± 0.5 m. This value provides a reasonable regional estimate to be applied to produce comparable relative sea-level curve for Atlantic Patagonia coast.
AguirreML (2003) Late Pleistocene and Holocene palaeoenvironments in Golfo San Jorge, Patagonia: Molluscan evidence. Marine Geology194: 3–30.
2.
AguirreMLRichianoSNegro SirchY (2006) Palaeoenvironments and palaeoclimates of the Quaternary molluscan faunas from the coastal area of Bahía Vera-Camarones (Chubut, Patagonia). Palaeogeography, Palaeoclimatology, Palaeoecology229: 251–286.
3.
BiniMConsoloniIIsolaI. (2013) Markers of palaeo sea-level in rocky coasts of patagonia (Argentina). Rendiconti Online: Società Geologica Italiana28: 24–27.
4.
BlumMDRobertsHH (2009) Drowning of the Mississippi Delta due to insufficient sediment supply and global sea-level rise. Nature Geoscience2: 488–491.
5.
ButzinMPrangeMLohmannG (2005) Radiocarbon simulations for the glacial ocean: The effects of wind stress, Southern Ocean sea ice and Heinrich events. Earth and Planetary Science Letters235: 45–61.
6.
CarterRWGOrfordJD (1984) Coarse clastic barrier beaches: A discussion of the distinctive dynamic and morphosedimentary characteristics. Marine Geology60: 377–389.
7.
CastroA (2008) Sociedad aborigines de Puerto Deseado antes de la conquista eruopea. In: SchavelzonD (ed.) El area fundacional de Puerto Deseado: Estudios de Arqueologia Historica. Buenos Aires: Buenos Aires De Los Cuatro Vientos, pp. 105–121.
8.
ClarkJAFarrellWEPeltierWR (1978) Global changes in postglacial sea level: A numerical simulation. Quaternary Research9: 265–287.
9.
CodignottoJOKokotRRMarcominiSC (1992) Neotectonism and sea-level changes in the coastal zone of Argentina. Journal of Coastal Research8: 125–133.
10.
CodignottoJOMarcominiSCSantillanaSN (1988) Terrazas marinas entre Puerto Deseado y Bahia Bustamante, Santa Cruz, Chubut. Revista de la Asociación Geológica Argentina43: 43–50.
11.
CorderoRRPanarelloHLanzelottiS. (2003) Radiocarbon age offsets between living organisms from the marine and continental reservoir in coastal localities of Patagonia (Argentina). Radiocarbon45: 9–15.
12.
DarwinC (1846) Geological Observations on South America. London: Smith, Elder and Co., 279 pp.
13.
D’OrbignyA (1834–1847) Voyage dans l’Amérique Méridionale. Mollusques. Tome V (3). Paris; Strasbourg: Pitois-Levrault, 758 pp.
14.
D’OrbignyA (1842–1844) Voyage dans l’Amérique Méridionale. Paléontologie. Tome III (4). Paris; Strasbourg: Pitois-Levrault, pp. 1–152.
15.
FeruglioE (1950) Descripción geológica de la Patagonia: Dirección General de Y.P.F. Tomo 3. Buenos Aires, pp. 74–197.
16.
GarreaudRDVuilleMCompagnucciR. (2009) Present-day South American climate. Palaeogeography, Palaeoclimatology, Palaeoecology281: 180–195.
17.
GehrelsR (2010) Sea-level changes since the Last Glacial Maximum: An appraisal of the IPCC Fourth Assessment Report. Journal of Quaternary Science25: 26–38.
18.
GuildersonTPBurckleLHemmingS. (2000) Late Pleistocene sea level variations derived from the Argentine shelf. Geochemistry, Geophysics, Geosystems1: 1055. DOI: 10.1029/2000GC000098.
19.
HortonBPPeltierWRCulverSJ. (2009) Holocene sea-level changes along the North Carolina Coastline and their implications for glacial isostatic adjustment models. Quaternary Science Reviews28: 1725–1736.
20.
IslaFIBujaleskyGG (2000) Cannibalisation of Holocene gravel beach-ridge plains, northern Tierra del Fuego, Argentina. Marine Geology170: 105–122.
21.
IslaFIBujaleskyGG (2008) Coastal geology and morphology of Patagonia and the Fuegian Archipelago. In: RabassaJ (ed.) The late Cenozic of Patagonia and Tierra del Fuego (Developments in Quaternary Science), vol. 11. Oxford: Elsevier, pp. 227–240.
22.
IslaFIIantanosNEstradaE (2004) Dinámica submareal y condiciones ambientales de la ría Deseado, Santa Cruz. Revista de la Asociación Geológica Argentina59: 367–375.
23.
IslaFIBujaleskyGGGalassoM. (2005) Morphology, grain-size and faunistic composition of the macrotidal beaches of Tierra del Fuego. Revista de la Asociación Geológica Argentina60: 435–445.
24.
IsolaIBiniMRiboliniA. (2011) Geomorphologic map of Northeastern Sector of San Jorge Gulf (Chubut, Argentina). Journal of Maps276–285.
25.
KelletatDH (2005) Notches. In: SchwartzML (ed.) Encyclopedia of Coastal Science. Bellingham, WA: Springer; Western Washington University, pp. 728–729.
26.
KershawSGuoL (2001) Marine notches in coastal cliffs: Indicators of relative sea-level change, Perachora Peninsula, central Greece. Marine Geology179: 213–228.
27.
MilneGAMitrovicaJX (2008) Searching for eustasy in deglacial sea-level histories. Quaternary Science Reviews27: 2292–2302.
28.
MilneGALongAJBassettSE (2005) Modelling Holocene relative sea-level observations from the Caribbean and South America. Quaternary Science Reviews24:1183–1202.
29.
MilneGAGehrelsWRHughesCW. (2009) Identifying the causes of sea-level change. Nature Geoscience2: 471–478.
30.
OppenheimerMO’NeilBCWebsterM. (2007) The limits of consensus. Science317: 1505–1506.
31.
OtvosEG (2000) Beach ridges – Definitions and significance. Geomorphology32: 83–108.
32.
PedojaKRegardVHussonL. (2011) Uplift of Quaternary shorelines in eastern Patagonia: Darwin revisited. Geomorphology127: 121–142.
33.
PeltierWR (1996) Global sea-level rise and glacial isostatic adjustment: An analysis of data from the coast of North America. Geophysical Research Letters23: 717–720.
34.
PirazzoliPA (1986) Marine notches. In: Van de PlasscheO (ed.) Sea-level Research: A Manual for the Collection and Evaluation of Data. Norwich: Geo Books, pp. 361–400.
35.
PirazzoliPA (1996) Sea-Level Changes: The Last 20,000 Years. Chichester: Wiley, 224 pp.
36.
RabassaJ (ed.) (2008) The Late Cenozoic of Patagonia and Tierra del Fuego (Developments in Quaternary Science), vol. 11. Oxford: Elsevier, p. 513.
37.
RamosVAGhiglioneMC (2008) Tectonic evolution of the Patagonian Andes. In: RabassaJ (ed.) The late Cenozic of Patagonia and Tierra del Fuego (Developments in Quaternary Science), vol. 11. Oxford: Elsevier, pp. 57–71.
38.
ReimerPJBaillieMGLBardE. (2009) INTCAL09 and MARINE09 radiocarbon age calibration curves 0-50,000 years cal BP. Radiocarbon51: 1111–1150.
39.
RiboliniAAguirreMBaneschiI. (2011) Holocene beach ridges and coastal evolution in the Cabo Raso bay (Atlantic Patagonian coast, Argentina). Journal of Coastal Research27: 973–983.
40.
RiboliniABiniMConsoloniI. (in press) Late-Pleistocene wedge structures along the Patagonian coast (Argentina): Chronological constraints and paleo-environmental implications. Geografiska Annaler Series A: Physical Geography.
41.
RostamiKPeltierWRManginiA (2000) Quaternary marine terraces, sea-level changes and uplift history of Patagonia, Argentina: Comparisons with predictions of the ICE-4G (VM2) model of the global process of glacial isostatic adjustment. Quaternary Science Reviews19: 1495–1525.
42.
RutterNRadtkeUSchnackEJ (1990) Comparison of ESR and amino acid data in correlating and dating Quaternary shorelines along the Patagonian Coast, Argentina. Journal of Coastal Research6: 391–411.
43.
RutterNSchnackEJdel RioJ. (1989) Correlation and dating of Quaternary littoral zones along the Patagonian coast, Argentina. Quaternary Science Reviews8: 213–234.
SchellmannGRadtkeU (2000) ESR dating stratigraphically well-constrained marine terraces along the Patagonian Atlantic coast (Argentina). Quaternary International68–71: 261–273.
46.
SchellmannGRadtkeU (2003) Coastal terraces and Holocene sea-level changes along the Patagonian Atlantic coast. Journal of Coastal Research19: 983–996.
47.
SchellmannGRadtkeU (2010) Timing and magnitude of Holocene sea-level changes along the middle and south Patagonian Atlantic coast derived from beach ridge systems, littoral terraces and valley-mouth terraces. Earth-Science Reviews103: 1–30.
48.
SolomonSPlattnerGKKnuttiR. (2008) Irreversible climate change due to carbon dioxide emissions. Proceedings of National Academy of Sciences of the United States of America106: 1704–1709.
49.
TannerWF (1995) Origin of beach ridges and swales. Marine Geology129: 149–161.
50.
TaylorMStoneGW (1996) Beach-ridges: A review. Journal of Coastal Research12: 612–621.
51.
TerrasiFDe CesareND’OnofrioA. (2008) High precision 14C AMS at CIRCE. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms266: 2221–2224.
52.
TerrasiFRogallaDDe CesareN. (2007) A new AMS facility in Caserta/Italy. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms259: 14–17.
53.
TrenhaileASPepperDATrenhaileRW. (1998) Stacks and notches at Hopewell Rocks, New Brunswick, Canada. Earth Surface Processes and Landforms23: 975–988.
54.
ZanchettaGConsoloniIIsolaI. (2012) New insight on the Holocene marine transgression in the Bahia Camarones (Chubut, Argentina). Italian Journal of Geosciences131: 19–31.
