Recent foraminiferal assemblages are identified in 70 grab samples from 20-380 m depth in the Pontine Archipelago (Tyrrhenian Sea, Italy). All broken and relict tests of benthic foraminifera and other bioclastic sediments were counted for each sample, in order to provide a more complete description of the benthic community. Hierarchical cluster analysis (HCA) was performed on the relative abundances (live + dead) of 53 taxa of benthic foraminifera that were common in the samples. Q-mode HCA recognizes three distinct foraminiferal biofacies, each associated with a particular bioclastic lithofacies: 1) the Asterigerinata-Lobatula-Rosalina biofacies occurs at 20-150 m and is dominated by benthic foraminifera, most notably epiphytic species such as Asterigerinata mantilla, Lobatula lobatula, and Rosalina brad vi; other bioclasts include rhodoliths, bryozoans, and echinoid spines, which constitute the rhodalgal lithofacies; 2) the Cassidulina carinata biofacies at intermediate depths of 100-250 m includes benthic and planktonic foraminifera among branches of bryozoans that constitute the bryomol lithofacies; also present are high percentages of reworked glauconitic tests of shallow-water taxa (e.g., Elphidium, Lobatula, and Asterigerinata), possibly related to Late Quaternary sea-level stillstands; 3) the Uvigerina-Bulimina biofacies at 200-380 m, that is characterized by Uvigerina mediterranea and Bulimina marginata; in addition to benthic and planktonic foraminifera, it has a molechfor lithofacies of bivalves and gastropods.

BENTHIC FORAMINIFERAL BIOFACIES IN TEMPERATE CARBONATE SEDIMENT IN THE WESTERN PONTINE ARCHIPELAGO (TYRRHENIAN SEA, ITALY) / Frezza, Virgilio; Pignatti, Johannes; Matteucci, Ruggero. - In: JOURNAL OF FORAMINIFERAL RESEARCH. - ISSN 0096-1191. - 40:4(2010), pp. 313-326. [10.2113/gsjfr.40.4.313]

BENTHIC FORAMINIFERAL BIOFACIES IN TEMPERATE CARBONATE SEDIMENT IN THE WESTERN PONTINE ARCHIPELAGO (TYRRHENIAN SEA, ITALY)

FREZZA, Virgilio;PIGNATTI, Johannes;MATTEUCCI, Ruggero
2010

Abstract

Recent foraminiferal assemblages are identified in 70 grab samples from 20-380 m depth in the Pontine Archipelago (Tyrrhenian Sea, Italy). All broken and relict tests of benthic foraminifera and other bioclastic sediments were counted for each sample, in order to provide a more complete description of the benthic community. Hierarchical cluster analysis (HCA) was performed on the relative abundances (live + dead) of 53 taxa of benthic foraminifera that were common in the samples. Q-mode HCA recognizes three distinct foraminiferal biofacies, each associated with a particular bioclastic lithofacies: 1) the Asterigerinata-Lobatula-Rosalina biofacies occurs at 20-150 m and is dominated by benthic foraminifera, most notably epiphytic species such as Asterigerinata mantilla, Lobatula lobatula, and Rosalina brad vi; other bioclasts include rhodoliths, bryozoans, and echinoid spines, which constitute the rhodalgal lithofacies; 2) the Cassidulina carinata biofacies at intermediate depths of 100-250 m includes benthic and planktonic foraminifera among branches of bryozoans that constitute the bryomol lithofacies; also present are high percentages of reworked glauconitic tests of shallow-water taxa (e.g., Elphidium, Lobatula, and Asterigerinata), possibly related to Late Quaternary sea-level stillstands; 3) the Uvigerina-Bulimina biofacies at 200-380 m, that is characterized by Uvigerina mediterranea and Bulimina marginata; in addition to benthic and planktonic foraminifera, it has a molechfor lithofacies of bivalves and gastropods.
benthic foraminifera; foraminifera; italy; mediterranean sea; pontine archipelago; tyrrhenian sea
01 Pubblicazione su rivista::01a Articolo in rivista
BENTHIC FORAMINIFERAL BIOFACIES IN TEMPERATE CARBONATE SEDIMENT IN THE WESTERN PONTINE ARCHIPELAGO (TYRRHENIAN SEA, ITALY) / Frezza, Virgilio; Pignatti, Johannes; Matteucci, Ruggero. - In: JOURNAL OF FORAMINIFERAL RESEARCH. - ISSN 0096-1191. - 40:4(2010), pp. 313-326. [10.2113/gsjfr.40.4.313]
File allegati a questo prodotto
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/363761
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 22
  • ???jsp.display-item.citation.isi??? 18
social impact