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, Alberto Collareta, Olivier Lambert, Walter Landini, G. Bosio, K. Gariboldi, Anna Gioncada, Christian de Muizon, G. Molli , Felix Marx, R. M. Varas-Malca, Mario Urbina, Giovanni Bianucci

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Based on mapping of laterally traceable stratigraphic discontinuities, we propose a highresolution 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.
Original languageEnglish
Pages (from-to)393-405
Number of pages13
JournalJournal of Maps
Volume15
Issue number2
DOIs
Publication statusPublished - 2019

Keywords

  • Allostratigraphy
  • vertebrate paleontology
  • facies analysis

Cite this

Di Celma, C., Pierantoni , P. P., Malinverno, E., Collareta, A., Lambert, O., Landini, W., ... Bianucci, G. (2019). Allostratigraphy and paleontology of the lower Miocene Chilcatay Formation in the Zamaca area, East Pisco basin, southern Peru. Journal of Maps, 15(2), 393-405. https://doi.org/10.1080/17445647.2019.1604439
Di Celma, C. ; Pierantoni , P. P. ; Malinverno, E. ; Collareta, Alberto ; Lambert, Olivier ; Landini, Walter ; Bosio, G. ; Gariboldi, K. ; Gioncada, Anna ; de Muizon, Christian ; Molli , G. ; Marx, Felix ; Varas-Malca, R. M. ; Urbina, Mario ; Bianucci, Giovanni. / Allostratigraphy and paleontology of the lower Miocene Chilcatay Formation in the Zamaca area, East Pisco basin, southern Peru. In: Journal of Maps. 2019 ; Vol. 15, No. 2. pp. 393-405.
@article{91d08ad767664c26a9ca2316cc201079,
title = "Allostratigraphy and paleontology of the lower Miocene Chilcatay Formation in the Zamaca area, East Pisco basin, southern Peru",
abstract = "Based on mapping of laterally traceable stratigraphic discontinuities, we propose a highresolution allostratigraphic scheme for one of the world’s foremost fossil marine vertebrate Lagerst{\"a}tten: 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.",
keywords = "Allostratigraphy, vertebrate paleontology, facies analysis",
author = "{Di Celma}, C. and Pierantoni, {P. P.} and E. Malinverno and Alberto Collareta and Olivier Lambert and Walter Landini and G. Bosio and K. Gariboldi and Anna Gioncada and {de Muizon}, Christian and G. Molli and Felix Marx and Varas-Malca, {R. M.} and Mario Urbina and Giovanni Bianucci",
year = "2019",
doi = "10.1080/17445647.2019.1604439",
language = "English",
volume = "15",
pages = "393--405",
journal = "Journal of Maps",
issn = "1744-5647",
publisher = "Taylor & Francis",
number = "2",

}

Di Celma, C, Pierantoni , PP, Malinverno, E, Collareta, A, Lambert, O, Landini, W, Bosio, G, Gariboldi, K, Gioncada, A, de Muizon, C, Molli , G, Marx, F, Varas-Malca, RM, Urbina, M & Bianucci, G 2019, 'Allostratigraphy and paleontology of the lower Miocene Chilcatay Formation in the Zamaca area, East Pisco basin, southern Peru', Journal of Maps, vol. 15, no. 2, pp. 393-405. https://doi.org/10.1080/17445647.2019.1604439

Allostratigraphy and paleontology of the lower Miocene Chilcatay Formation in the Zamaca area, East Pisco basin, southern Peru. / Di Celma, C.; Pierantoni , P. P.; Malinverno, E.; Collareta, Alberto; Lambert, Olivier; Landini, Walter; Bosio, G.; Gariboldi, K.; Gioncada, Anna; de Muizon, Christian; Molli , G.; Marx, Felix; Varas-Malca, R. M.; Urbina, Mario; Bianucci, Giovanni.

In: Journal of Maps, Vol. 15, No. 2, 2019, p. 393-405.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Allostratigraphy and paleontology of the lower Miocene Chilcatay Formation in the Zamaca area, East Pisco basin, southern Peru

AU - Di Celma, C.

AU - Pierantoni , P. P.

AU - Malinverno, E.

AU - Collareta, Alberto

AU - Lambert, Olivier

AU - Landini, Walter

AU - Bosio, G.

AU - Gariboldi, K.

AU - Gioncada, Anna

AU - de Muizon, Christian

AU - Molli , G.

AU - Marx, Felix

AU - Varas-Malca, R. M.

AU - Urbina, Mario

AU - Bianucci, Giovanni

PY - 2019

Y1 - 2019

N2 - Based on mapping of laterally traceable stratigraphic discontinuities, we propose a highresolution 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.

AB - Based on mapping of laterally traceable stratigraphic discontinuities, we propose a highresolution 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.

KW - Allostratigraphy

KW - vertebrate paleontology

KW - facies analysis

U2 - 10.1080/17445647.2019.1604439

DO - 10.1080/17445647.2019.1604439

M3 - Article

VL - 15

SP - 393

EP - 405

JO - Journal of Maps

JF - Journal of Maps

SN - 1744-5647

IS - 2

ER -