Taphonomy of a Panopea Menard de la Groye, 1807 shell bed from the Pisco Formation (Miocene, Peru)

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00023272%3A_____%2F21%3A10135715" target="_blank" >RIV/00023272:_____/21:10135715 - isvavai.cz</a>

Výsledek na webu

<a href="https://sciencepress.mnhn.fr/fr/periodiques/comptes-rendus-palevol/20/8" target="_blank" >https://sciencepress.mnhn.fr/fr/periodiques/comptes-rendus-palevol/20/8</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.5852/cr-palevol2021v20a8" target="_blank" >10.5852/cr-palevol2021v20a8</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Taphonomy of a Panopea Menard de la Groye, 1807 shell bed from the Pisco Formation (Miocene, Peru)

Popis výsledku v původním jazyce

Invertebrate taphonomy can provide significant information about the post-mortem processes that affected the fossil record. In the East Pisco Basin of southern Peru, a Panopea Menard de la Groye, 1807 shell bed was found in the upper Miocene strata of the Pisco Formation, hinting at a peculiar biostratinomic and diagenetic history. This bed contains abundant invertebrate fossil molds cemented by dolomite. The specimens of the deep infaunal bivalve, Panopea sp., occur together with bivalves representative of shallow infaunal species (Trachycardium sp. and Dosinia ponderosa [Gray, 1838]) and balanid barnacles, which are sessile encrusters. The Panopea specimens host compound molds evidencing an abundant encrusting fauna, including serpulids, ?foraminifera, bryozoans, and barnacles that colonized the inner surfaces of the valves before their final burial. We hypothesize that short-term, storm-related processes exhumed the living bivalves, resulting in a sedimentological concentration of relatively well-preserved shells. After the death of the exhumed bivalves, the inner surfaces of the articulated Panopea shells, representing hard-substratal, sheltered environments on an otherwise unstable sandy seafloor (i.e., &quot;benthic islands&quot;), were colonized by different encrusting organisms. Following the final burial, dolomite precipitated, cementing the sediment infill of the valves. Lastly, a decrease of pH occurred at the sulfate reduction-methanogenesis boundary, inducing the dissolution of the shell carbonate.

Název v anglickém jazyce

Taphonomy of a Panopea Menard de la Groye, 1807 shell bed from the Pisco Formation (Miocene, Peru)

Popis výsledku anglicky

Invertebrate taphonomy can provide significant information about the post-mortem processes that affected the fossil record. In the East Pisco Basin of southern Peru, a Panopea Menard de la Groye, 1807 shell bed was found in the upper Miocene strata of the Pisco Formation, hinting at a peculiar biostratinomic and diagenetic history. This bed contains abundant invertebrate fossil molds cemented by dolomite. The specimens of the deep infaunal bivalve, Panopea sp., occur together with bivalves representative of shallow infaunal species (Trachycardium sp. and Dosinia ponderosa [Gray, 1838]) and balanid barnacles, which are sessile encrusters. The Panopea specimens host compound molds evidencing an abundant encrusting fauna, including serpulids, ?foraminifera, bryozoans, and barnacles that colonized the inner surfaces of the valves before their final burial. We hypothesize that short-term, storm-related processes exhumed the living bivalves, resulting in a sedimentological concentration of relatively well-preserved shells. After the death of the exhumed bivalves, the inner surfaces of the articulated Panopea shells, representing hard-substratal, sheltered environments on an otherwise unstable sandy seafloor (i.e., &quot;benthic islands&quot;), were colonized by different encrusting organisms. Following the final burial, dolomite precipitated, cementing the sediment infill of the valves. Lastly, a decrease of pH occurred at the sulfate reduction-methanogenesis boundary, inducing the dissolution of the shell carbonate.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10506 - Paleontology

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2021

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Comptes Rendus - Palevol

ISSN

1631-0683

e-ISSN

—

Svazek periodika

20

Číslo periodika v rámci svazku

8

Stát vydavatele periodika

FR - Francouzská republika

Počet stran výsledku

22

Strana od-do

119-140

Kód UT WoS článku

000624593300001

EID výsledku v databázi Scopus

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