Allostratigraphy and paleontology of the lower Miocene Chilcatay Formation in the Zamaca area, East Pisco basin, southern Peru
Based on mapping of laterally traceable stratigraphic discontinuities, we propose a high-resolution allostratigraphic scheme for one of the world’s foremost fossil marine vertebrate Lagerstätten: the lower Miocene strata of the Chilcatay Formation exposed along the Ica River near Zamaca, southern Pe...
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ftdoajarticles:oai:doaj.org/article:81fb9016711042c1a85456245e9f4ffc 2023-05-15T15:37:11+02:00 Allostratigraphy and paleontology of the lower Miocene Chilcatay Formation in the Zamaca area, East Pisco basin, southern Peru C. Di Celma P. P. Pierantoni E. Malinverno A. Collareta O. Lambert W. Landini G. Bosio K. Gariboldi A. Gioncada C. de Muizon G. Molli F. G. Marx R. M. Varas-Malca M. Urbina G. Bianucci 2019-07-01T00:00:00Z https://doi.org/10.1080/17445647.2019.1604439 https://doaj.org/article/81fb9016711042c1a85456245e9f4ffc EN eng Taylor & Francis Group http://dx.doi.org/10.1080/17445647.2019.1604439 https://doaj.org/toc/1744-5647 1744-5647 doi:10.1080/17445647.2019.1604439 https://doaj.org/article/81fb9016711042c1a85456245e9f4ffc Journal of Maps, Vol 15, Iss 2, Pp 393-405 (2019) allostratigraphy facies analysis vertebrate paleontology Maps G3180-9980 article 2019 ftdoajarticles https://doi.org/10.1080/17445647.2019.1604439 2022-12-30T22:24:19Z Based on mapping of laterally traceable stratigraphic discontinuities, we propose a high-resolution allostratigraphic scheme for one of the world’s foremost fossil marine vertebrate Lagerstätten: the lower Miocene strata of the Chilcatay Formation exposed along the Ica River near Zamaca, southern Peru. Measured sections combined with 1:10,000 scale mapping of a 24 km2 area provide an overview of the stratal architecture, as well as a general facies framework and interpretation of the various depositional settings. As a whole, the Chilcatay alloformation is bounded by the CE0.1 unconformity at the base and the PE0.0 unconformity at the top. An internal Chilcatay surface, termed CE0.2, splits the alloformation into two distinct allomembers (Ct1 and Ct2). The Ct1 allomember comprises three facies associations recording deposition in shoreface, offshore, and subaqueous delta settings. The Ct2 allomember comprises two facies associations, recording deposition in shoreface and offshore settings. Using these data, we place the rich marine vertebrate assemblage in a precise spatial and stratigraphic framework. The well-diversified vertebrate assemblage is dominated by cetaceans (mostly odontocetes) and sharks (mostly lamniforms and carcharhiniforms); rays, bony fish, and turtles are also present. Taxonomic novelties include the first records of baleen whales, platanistids, and eurhinodelphinids from the Chilcatay Formation. Article in Journal/Newspaper baleen whales Directory of Open Access Journals: DOAJ Articles Pisco ENVELOPE(-62.450,-62.450,-62.950,-62.950) Journal of Maps 15 2 393 405 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
allostratigraphy facies analysis vertebrate paleontology Maps G3180-9980 |
spellingShingle |
allostratigraphy facies analysis vertebrate paleontology Maps G3180-9980 C. Di Celma P. P. Pierantoni E. Malinverno A. Collareta O. Lambert W. Landini G. Bosio K. Gariboldi A. Gioncada C. de Muizon G. Molli F. G. Marx R. M. Varas-Malca M. Urbina G. Bianucci Allostratigraphy and paleontology of the lower Miocene Chilcatay Formation in the Zamaca area, East Pisco basin, southern Peru |
topic_facet |
allostratigraphy facies analysis vertebrate paleontology Maps G3180-9980 |
description |
Based on mapping of laterally traceable stratigraphic discontinuities, we propose a high-resolution allostratigraphic scheme for one of the world’s foremost fossil marine vertebrate Lagerstätten: the lower Miocene strata of the Chilcatay Formation exposed along the Ica River near Zamaca, southern Peru. Measured sections combined with 1:10,000 scale mapping of a 24 km2 area provide an overview of the stratal architecture, as well as a general facies framework and interpretation of the various depositional settings. As a whole, the Chilcatay alloformation is bounded by the CE0.1 unconformity at the base and the PE0.0 unconformity at the top. An internal Chilcatay surface, termed CE0.2, splits the alloformation into two distinct allomembers (Ct1 and Ct2). The Ct1 allomember comprises three facies associations recording deposition in shoreface, offshore, and subaqueous delta settings. The Ct2 allomember comprises two facies associations, recording deposition in shoreface and offshore settings. Using these data, we place the rich marine vertebrate assemblage in a precise spatial and stratigraphic framework. The well-diversified vertebrate assemblage is dominated by cetaceans (mostly odontocetes) and sharks (mostly lamniforms and carcharhiniforms); rays, bony fish, and turtles are also present. Taxonomic novelties include the first records of baleen whales, platanistids, and eurhinodelphinids from the Chilcatay Formation. |
format |
Article in Journal/Newspaper |
author |
C. Di Celma P. P. Pierantoni E. Malinverno A. Collareta O. Lambert W. Landini G. Bosio K. Gariboldi A. Gioncada C. de Muizon G. Molli F. G. Marx R. M. Varas-Malca M. Urbina G. Bianucci |
author_facet |
C. Di Celma P. P. Pierantoni E. Malinverno A. Collareta O. Lambert W. Landini G. Bosio K. Gariboldi A. Gioncada C. de Muizon G. Molli F. G. Marx R. M. Varas-Malca M. Urbina G. Bianucci |
author_sort |
C. Di Celma |
title |
Allostratigraphy and paleontology of the lower Miocene Chilcatay Formation in the Zamaca area, East Pisco basin, southern Peru |
title_short |
Allostratigraphy and paleontology of the lower Miocene Chilcatay Formation in the Zamaca area, East Pisco basin, southern Peru |
title_full |
Allostratigraphy and paleontology of the lower Miocene Chilcatay Formation in the Zamaca area, East Pisco basin, southern Peru |
title_fullStr |
Allostratigraphy and paleontology of the lower Miocene Chilcatay Formation in the Zamaca area, East Pisco basin, southern Peru |
title_full_unstemmed |
Allostratigraphy and paleontology of the lower Miocene Chilcatay Formation in the Zamaca area, East Pisco basin, southern Peru |
title_sort |
allostratigraphy and paleontology of the lower miocene chilcatay formation in the zamaca area, east pisco basin, southern peru |
publisher |
Taylor & Francis Group |
publishDate |
2019 |
url |
https://doi.org/10.1080/17445647.2019.1604439 https://doaj.org/article/81fb9016711042c1a85456245e9f4ffc |
long_lat |
ENVELOPE(-62.450,-62.450,-62.950,-62.950) |
geographic |
Pisco |
geographic_facet |
Pisco |
genre |
baleen whales |
genre_facet |
baleen whales |
op_source |
Journal of Maps, Vol 15, Iss 2, Pp 393-405 (2019) |
op_relation |
http://dx.doi.org/10.1080/17445647.2019.1604439 https://doaj.org/toc/1744-5647 1744-5647 doi:10.1080/17445647.2019.1604439 https://doaj.org/article/81fb9016711042c1a85456245e9f4ffc |
op_doi |
https://doi.org/10.1080/17445647.2019.1604439 |
container_title |
Journal of Maps |
container_volume |
15 |
container_issue |
2 |
container_start_page |
393 |
op_container_end_page |
405 |
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1766367638363045888 |