On the formations of the Pampas in the footsteps of Darwin: South of the Salado
In 1833 during his journey across the Buenos Aires Pampas, Charles Darwin made observations that reflected his thoughts on two major landscape units, Pampa interserrana and Pampa deprimida, later identified by other authors. Darwin grouped the Pampean sediments into a single unit, the Pampean Format...
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2009
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v64_n1_p124_Zarate http://hdl.handle.net/20.500.12110/paper_00044822_v64_n1_p124_Zarate |
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paper:paper_00044822_v64_n1_p124_Zarate2023-06-08T14:26:12Z On the formations of the Pampas in the footsteps of Darwin: South of the Salado Folguera, Andrés Buenos aires Calcrete Charles darwin Geomorphology Pampean sediments calcrete fluvial deposit geomorphology homogeneity landscape Miocene morphostructure Pliocene sedimentary sequence sedimentation stratigraphy Argentina Buenos Aires [Argentina] Pampas South America Mollusca Vertebrata In 1833 during his journey across the Buenos Aires Pampas, Charles Darwin made observations that reflected his thoughts on two major landscape units, Pampa interserrana and Pampa deprimida, later identified by other authors. Darwin grouped the Pampean sediments into a single unit, the Pampean Formation, based upon the lithological homogeneity and the large extension of the deposits; the unit was thought to be of estuarine-marine origin and attributed to the Recent Epoch considering the paleontological content (vertebrates and mollusks). At present, the Pampean sedimentary succession, which accumulated approximately during the last 11-12 Ma, is interpreted as a pedosedimentary sequence due to the ubiquity of pedogenetic features throughout the deposits. Four main subcycles of sedimentation are identified related to reactivations of the Pampean landscape. At a regional scale, the outcrop distribution of Pampean sediments of different ages suggests the dominance of more stable conditions since the late Miocene-Pliocene in a vast area of Pampa interserrana, documented by the formation of calcretes. However, sedimentation during the late Pliocene-Pleistocene was active within the domain of the Salado tectonic basin and Sierras de Tandil. The regional disparity shown by the Pampean stratigraphic record reveals the major morphostructural differences of its basement. Fil:Folguera, A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2009 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v64_n1_p124_Zarate http://hdl.handle.net/20.500.12110/paper_00044822_v64_n1_p124_Zarate |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Buenos aires Calcrete Charles darwin Geomorphology Pampean sediments calcrete fluvial deposit geomorphology homogeneity landscape Miocene morphostructure Pliocene sedimentary sequence sedimentation stratigraphy Argentina Buenos Aires [Argentina] Pampas South America Mollusca Vertebrata |
| spellingShingle |
Buenos aires Calcrete Charles darwin Geomorphology Pampean sediments calcrete fluvial deposit geomorphology homogeneity landscape Miocene morphostructure Pliocene sedimentary sequence sedimentation stratigraphy Argentina Buenos Aires [Argentina] Pampas South America Mollusca Vertebrata Folguera, Andrés On the formations of the Pampas in the footsteps of Darwin: South of the Salado |
| topic_facet |
Buenos aires Calcrete Charles darwin Geomorphology Pampean sediments calcrete fluvial deposit geomorphology homogeneity landscape Miocene morphostructure Pliocene sedimentary sequence sedimentation stratigraphy Argentina Buenos Aires [Argentina] Pampas South America Mollusca Vertebrata |
| description |
In 1833 during his journey across the Buenos Aires Pampas, Charles Darwin made observations that reflected his thoughts on two major landscape units, Pampa interserrana and Pampa deprimida, later identified by other authors. Darwin grouped the Pampean sediments into a single unit, the Pampean Formation, based upon the lithological homogeneity and the large extension of the deposits; the unit was thought to be of estuarine-marine origin and attributed to the Recent Epoch considering the paleontological content (vertebrates and mollusks). At present, the Pampean sedimentary succession, which accumulated approximately during the last 11-12 Ma, is interpreted as a pedosedimentary sequence due to the ubiquity of pedogenetic features throughout the deposits. Four main subcycles of sedimentation are identified related to reactivations of the Pampean landscape. At a regional scale, the outcrop distribution of Pampean sediments of different ages suggests the dominance of more stable conditions since the late Miocene-Pliocene in a vast area of Pampa interserrana, documented by the formation of calcretes. However, sedimentation during the late Pliocene-Pleistocene was active within the domain of the Salado tectonic basin and Sierras de Tandil. The regional disparity shown by the Pampean stratigraphic record reveals the major morphostructural differences of its basement. |
| author |
Folguera, Andrés |
| author_facet |
Folguera, Andrés |
| author_sort |
Folguera, Andrés |
| title |
On the formations of the Pampas in the footsteps of Darwin: South of the Salado |
| title_short |
On the formations of the Pampas in the footsteps of Darwin: South of the Salado |
| title_full |
On the formations of the Pampas in the footsteps of Darwin: South of the Salado |
| title_fullStr |
On the formations of the Pampas in the footsteps of Darwin: South of the Salado |
| title_full_unstemmed |
On the formations of the Pampas in the footsteps of Darwin: South of the Salado |
| title_sort |
on the formations of the pampas in the footsteps of darwin: south of the salado |
| publishDate |
2009 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v64_n1_p124_Zarate http://hdl.handle.net/20.500.12110/paper_00044822_v64_n1_p124_Zarate |
| work_keys_str_mv |
AT folgueraandres ontheformationsofthepampasinthefootstepsofdarwinsouthofthesalado |
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1768545626565378048 |