High-frequency controls on alluvial successions: An integrated sedimentological and palaeopedological approach to the Plio-Pleistocene of Argentina

Beilinson, Elisa; Raigemborn, María Sol

doi:10.1016/j.quaint.2013.08.046

Cited by 5 publications

(2 citation statements)

References 67 publications

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“…In contrast to their counterparts in coal-forming perennial wetlands, however, very little is known with regard to the strongly seasonal character of soil formation and sedimentary dynamics in inundation savannah settings or their relationship to longer-term variability of environmental and hydrological conditions (Wright et al, 2000;Greb et al, 2006). This is despite the major role these particular tropical and subtropical environments play for the sustainable use of hydrological resources on a global scale (Dugan, 1992), and limits their use as modern analogues for the interpretation of buried soils (hereafter termed paleosols) in alluvial sediments in the rock record (e.g., Platt and Keller, 1992;Kraus, 1997;Aslan and Autin, 1998;Wright et al, 2000;Varela et al, 2012;Beilinson and Raigemborn, 2013). Alluvial surface soils in the LM show abundant pedological evidence for dominantly hydromorphic conditions (Boixadera et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

Holocene floodplain soils along the Río Mamoré, northern Bolivia, and their implications for understanding inundation and depositional patterns in seasonal wetland settings

May

Plotzki

Rodrigues

et al. 2015

Sedimentary Geology

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The Llanos de Moxos (LM) in the Bolivian Amazon basin host one of the largest seasonally inundated savannah landscapes on Earth. Very little is known of this area with regard to sedimentary dynamics, soil formation, or their relationship to longer-term climatic and hydrological variability in this setting. Here we present a detailed study of three floodplain depositional sequences building up the inundation savannah along the Mamoré River in the central LM. Pleistocene sands and silts (unit 1) are overlain by thick overbank deposits of mostly Holocene age (unit 2) on both sides of the Mamoré River, and underline the importance of extensive flooding processes for the late Quaternary sedimentary and geomorphic evolution of the LM. The fine-grained distal overbank sediments show signs of strong modification by hydromorphic processes and reflect spatial and temporal variations in flood inundation patterns. In addition, widespread dark gray to blackish soil and paleosol horizons are intercalated with the overbank sediments, but lack evidence for significant weathering. These horizons are likely the result of cumulative incorporation of organic material under conditions of particularly low sedimentation rates. Therefore, their formation should be linked to processes such as channel migration, longer-term meanderbelt evolution, avulsive drainage reorganization, changes in sediment supply or climatically induced variations in flooding type, frequency or magnitude. The common occurrence of these floodplain soils in the early to mid-Holocene may thus reflect the combined effects of hydrological, geomorphic and sedimentary changes during a drier mid-Holocene.

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Section: Introductionmentioning

confidence: 99%

Holocene floodplain soils along the Río Mamoré, northern Bolivia, and their implications for understanding inundation and depositional patterns in seasonal wetland settings

May

Plotzki

Rodrigues

et al. 2015

Sedimentary Geology

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“…sensu Cione et al 2007) which is similar to the interpretation of Fidalgo and Gentile (1995). They indicated that fluvial deposits in the Cliff to the south of Mar del Plata corresponded to the youngest Allomember of the Punta San Andrés Alloformation, interpreted as a braided, non-confined fluvial system (Beilinson and Raigemborn 2013), which could be correlated with Vela Formation in Tandilia. In erosional unconformity over the calcareous regional crust lie the sediments of the Las Á nimas Formation (aeolian sandy silt), assigned to the Late Pleistocene-Holocene (Rabassa 1971(Rabassa , 1973.…”

Section: Las áNimas Fmmentioning

confidence: 99%

Neogene–Quaternary in Tandilia, South America: litho- bio- magnetostratigraphy

et al. 2017

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This paper aims to contribute to the stratigraphic and geochronological knowledge of the Neogene-Quaternary of the geologic province of Tandilia by doing lithostratigraphic, paleomagnetic and paleontological analyses. Four lithostratigraphic units have been recognized. The oldest (Late Miocene) constitutes a unit composed of colluvium deposits; it lays in erosional unconformity over the Neoproterozoic rocks. This unconformity is related to important events in the Andes during the Middle-Late Miocene. Over the oldest colluvial sediments, and placed in erosional unconformity, there are sediments assigned to the Barker Formation which are essentially fluvial deposits with a development of several paleosols. Owing to the fossil remains, this unit is assigned to the Montehermosan-Chapadmalalan Stage/Age, whereas the paleomagnetic record would correspond to C3A, Gilbert and Gauss chrons. So, the age is narrowed to the timespan 7.1-3.1 Ma (Late Miocene-Early Pliocene). The Vela Formation lays in erosional unconformity over the Barker Formation. It also has fluvial origin, while the youngest unit (Las Á nimas Formation) corresponds to loess. Both units provide normal polarity and were assigned to Brunhes chron (\0.78 Ma). The Vela Formation presents fossil remains from Bonaerian-Lujanian Stage/Age and belongs to the Middle Pleistocene. The hiatus between the Barker and Vela Formations seems to be considerable: it represents at least 2.6 million years. The reason for the lack of sedimentary records is still a matter of discussion. The deposition of Las Animas Formation seems to span the last 40,000 years. However, this could be linked to a major entrance of windcarried sediments during dry periods, including the Last Glacial Maximum. The hiatus between the Vela and Las Á nimas Formations may have been over 100,000 years.

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Paleosols of the Maastrichtian dinosaur-bearing Chorrillo Formation (southern Patagonia, Argentina): Paleoenvironmental and paleoclimate implications

Raigemborn

Lizzoli

Paz

et al. 2023

Cretaceous Research

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High-frequency controls on alluvial successions: An integrated sedimentological and palaeopedological approach to the Plio-Pleistocene of Argentina

Cited by 5 publications

References 67 publications

Holocene floodplain soils along the Río Mamoré, northern Bolivia, and their implications for understanding inundation and depositional patterns in seasonal wetland settings

Holocene floodplain soils along the Río Mamoré, northern Bolivia, and their implications for understanding inundation and depositional patterns in seasonal wetland settings

Neogene–Quaternary in Tandilia, South America: litho- bio- magnetostratigraphy

Paleosols of the Maastrichtian dinosaur-bearing Chorrillo Formation (southern Patagonia, Argentina): Paleoenvironmental and paleoclimate implications

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