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

Schellmann, Gerhard; Radtke, Ulrich

doi:10.1016/j.earscirev.2010.06.003

Cited by 97 publications

(146 citation statements)

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“…Evidence of recent tectonic activity was reported especially on the Pacific side of the Strait of Magellan (Bartole et al, 2000) and strike-slip faults are known to be linked to the complex dynamics of the collisional margin of the Southern Chilean plate (Lodolo et al, 2003). However, the south-eastern coast of Patagonia and the northeastern coast of Tierra del Fuego are considered mostly tectonically stable during the Holocene (Schellmann & Radtke, 2010) and the Holocene palaeogeography of the area is deemed to be mainly controlled by glacio-isostatic rearrangement, with subsequent mild tectonic activity resulting from deglaciation (De Muro et al, 2012;Rabassa et al, 1992;Winslow & Prieto, 1991). As previously observed (Schellmann & Radtke, 2010), the relative marine ingression that produced terraced sequences is likely to be linked to uplift of the coastal system and inland following final deglaciation of the region.…”

Section: Discussionmentioning

confidence: 99%

“…However, the south-eastern coast of Patagonia and the northeastern coast of Tierra del Fuego are considered mostly tectonically stable during the Holocene (Schellmann & Radtke, 2010) and the Holocene palaeogeography of the area is deemed to be mainly controlled by glacio-isostatic rearrangement, with subsequent mild tectonic activity resulting from deglaciation (De Muro et al, 2012;Rabassa et al, 1992;Winslow & Prieto, 1991). As previously observed (Schellmann & Radtke, 2010), the relative marine ingression that produced terraced sequences is likely to be linked to uplift of the coastal system and inland following final deglaciation of the region. Isostatic rebound probably occurred in synchronicity with sealevel changes or rather late compared to post-glacial transgression, and this uplift is superimposed on to the local geological setting in a complex manner that is currently not entirely understood (Brambati et al, 1998).…”

Section: Discussionmentioning

confidence: 99%

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Geomorphology of marine and glacio-lacustrine terraces and raised shorelines in the northern sector of Península Brunswick, Patagonia, Straits of Magellan, Chile

et al. 2018

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This paper illustrates a detailed geomorphological map (scale 1:50,000) of the marine and transitional terraces (glacio-lacustrine to marine) and raised shorelines linked to Holocene glacio-eustasy and neo-tectonics in the northern area of the Brunswick Penìnsula (Chilean region of the Strait of Magellan). The mapped area is located in Tierra del Fuego between the Segunda Angostura and Seno Otway. This map is the result of geomorphological field survey data integrated with the interpretation of aerial photographs and remote sensing imagery. The survey has allowed the mapping of a sequence of terraces and raised shorelines to be completed. The sequence mainly consists of four orders of marine and glacio-lacustrine terraced deposits, with elevations ranging from 25 to 1 m above mean sea level. The map also presents other landforms and deposits, with their formation linked to littoral, fluvial, glacial and aeolian processes. ARTICLE HISTORY

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Geomorphology of marine and glacio-lacustrine terraces and raised shorelines in the northern sector of Península Brunswick, Patagonia, Straits of Magellan, Chile

et al. 2018

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“…al., 2004;Victor et al, 2011), whereas in the more humid south only Holocene beach ridges have been documented (Nelson and Manley, 1992;Bookhagen et al, 2006;Melnick et al, 2006). In Argentinian Patagonia, Holocene and Pleistocene shoreline sequences are also preserved, but the latter are scarcer because of probable erosion (Schellmann and Radtke, 2010;Pedoja et al, 2011).…”

Section: Introductionmentioning

confidence: 98%

Preservation of beach ridges due to pedogenic calcrete development in the Tongoy palaeobay, North-Central Chile

et al. 2011

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At the Tongoy palaeobay in north-central Chile, a series of beach ridges developed during seaward progradation that took place after the MIS 11 sea-level highstand (412 ka). The microrelief left by this succession of beach ridges has been well preserved from erosion due to the development of a calcrete (petrocalcic horizons), which was resistant to the chemical and physical weathering that characterized the area during humid phases of the late Pleistocene and middle Holocene. Macro-and micromorphological analysis shows that the calcrete is of pedogenic origin and formed during two stages: in the first stage a massive (beta) calcrete developed, followed during the second stage by a laminar (alpha) calcrete. Each event in the development of the calcrete was intimately related to the foregoing process, mainly due to changes in the permeability of the profile horizons. During the first stages of development, organisms played an important role in the precipitation of calcite, which made the calcrete less permeable and favoured the accumulation of ponded water during the wet season. As a result of this increased humidity, calcium carbonate with a laminar structure was precipitated. The development of the calcrete was also intimately associated with the evolution of the drainage network, which is characterized by a trellis pattern of tributaries parallel to the beach ridges. This study demonstrates the importance of soil genesis in the geomorphological evolution of landscapes.

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“…However, In Southern Patatagonia the macrotidal effects produced differences between estuaries and open-ocean sequences (Schellmann and Radtke 2010). In Tierra del Fuego, the Andean tectonics was quite different to the north and south of the Cordillera Bujalesky 2008, Isla andAngulo 2015).…”

Section: Evolution Of Barriers and Spitsmentioning

confidence: 99%

Coastal barriers from Argentina: Buenos Aires, Patagonia and Tierra del Fuego

Isla¹

2017

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Barriers, barrier islands and spits characterise low-lying coasts. However, they can grow along erosive coasts where there is a constant supply of sand, gravel, or both. At the Argentine coast, sandy barriers characterise the template coast of Buenos Aires. The availability of gravel at the Patagonian and Tierra del Fuego coasts induces the formation beach-ridge plains that can derived into coarse-grained spits. The morphology of these spits obeys to the basin depth and the availability of sediment. Recurved spits signify that the beach drift is locally modified by the action of waves or sediment-supply shortages. Some spits are today subject to local erosion (cannibalisation) that compensates these sediment deficits. Barriers and spits are ideal to locate harbours, marinas or touristic (resort) villages. However, the freshwater volumes inside their bodies are limited, even in areas where rain-fed aquifers have plenty of capacity. In this sense, resort villages are limited in their urban sprawl and planners should foresee these resource-based limitations.

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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

Cited by 97 publications

References 54 publications

Geomorphology of marine and glacio-lacustrine terraces and raised shorelines in the northern sector of Península Brunswick, Patagonia, Straits of Magellan, Chile

Geomorphology of marine and glacio-lacustrine terraces and raised shorelines in the northern sector of Península Brunswick, Patagonia, Straits of Magellan, Chile

Preservation of beach ridges due to pedogenic calcrete development in the Tongoy palaeobay, North-Central Chile

Coastal barriers from Argentina: Buenos Aires, Patagonia and Tierra del Fuego

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