Please use this identifier to cite or link to this item: http://hdl.handle.net/2122/9542
AuthorsZanchetta, G.* 
Bini, M.* 
Isola, I.* 
Pappalardo, M.* 
Ribolini, A.* 
Consoloni, I.* 
Boretto, G.* 
Fucks, E.* 
Ragaini, L.* 
Terrasi, F.* 
TitleMiddle- to late-Holocene relative sea-level changes at Puerto Deseado (Patagonia, Argentina)
Issue Date2014
Series/Report no.3/24 (2014)
DOI10.1177/0959683613518589
URIhttp://hdl.handle.net/2122/9542
Keywordsabrasive notches, Argentina, beach ridges, middle to late Holocene, Patagonia, relative sea level
Subject Classification01. Atmosphere::01.01. Atmosphere::01.01.02. Climate 
AbstractStratigraphic, 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.
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