MAASTRICHTIAN TO EOCENE CALCAREOUS NANNOFOSSIL BIOSTRATIGRAPHY FROM THE TABIAGO SECTION, BRIANZA AREA, NORTHERN ITALY

Calcareous nannofossil biostratigraphic investigations have been carried out on samples collected from the Tabiago section, Brianza, northern Italy. This section records early Maastrichtian (CC23b nannofossil zone) to early Eocene (NP10 nannofossil zone) calcareous nannofossil assemblages. The Creta...

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Main Authors: FABRIZIO TREMOLADA, DARIO SCIUNNACH, GIANCARLO SCARDIA, ISABELLA PREMOLI SILVA
Format: Article
Language:English
Published: Università degli Studi di Milano 2008-03-01
Series:Rivista Italiana di Paleontologia e Stratigrafia
Subjects:
Online Access:https://riviste.unimi.it/index.php/RIPS/article/view/6367
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spelling doaj-58e2574405bf4a58b019507b87a8a9d62020-11-25T00:47:13ZengUniversità degli Studi di MilanoRivista Italiana di Paleontologia e Stratigrafia0035-68832039-49422008-03-01114110.13130/2039-4942/63675678MAASTRICHTIAN TO EOCENE CALCAREOUS NANNOFOSSIL BIOSTRATIGRAPHY FROM THE TABIAGO SECTION, BRIANZA AREA, NORTHERN ITALYFABRIZIO TREMOLADADARIO SCIUNNACHGIANCARLO SCARDIAISABELLA PREMOLI SILVACalcareous nannofossil biostratigraphic investigations have been carried out on samples collected from the Tabiago section, Brianza, northern Italy. This section records early Maastrichtian (CC23b nannofossil zone) to early Eocene (NP10 nannofossil zone) calcareous nannofossil assemblages. The Cretaceous-Tertiary transition is characterized by major changes in sedimentation rates and two likely stratigraphic gaps. The Cretaceous Brenno Formation was deposited with a high sedimentation rate (~20 m/m.y.), whilst the Tabiago Formation of Paleogene age records a drastic decrease (~10 m/m.y.). The absence of the CC26 zonal marker Micula prinsii may indicate a stratigraphic hiatus or an extremely condensed level in the latest Maastrichtian. However, only two samples have been collected and analyzed in this interval due to low exposure of the outcrop, and the absence of M. prinsii could be the result of diagenetic overprint or insufficient sampling. A stratigraphic hiatus or a very condensed interval corresponds to the upper part of NP1 nannofossil zone and PƒÑ foraminiferal Zone and P1a Subzone in the early Paleocene. The poor exposure of the outcrop prevents to precisely locate the zonal boundaries between NP4 and NP5 and between NP9 and NP10 and impedes the documentation of possible further stratigraphic gaps or condensed intervals.https://riviste.unimi.it/index.php/RIPS/article/view/6367Calcareous nannofossilsBiostratigraphyMaastrichtianPaleoceneEoceneNorthern ItalyLombardyCretaceous/Tertiary boundary
collection DOAJ
language English
format Article
sources DOAJ
author FABRIZIO TREMOLADA
DARIO SCIUNNACH
GIANCARLO SCARDIA
ISABELLA PREMOLI SILVA
spellingShingle FABRIZIO TREMOLADA
DARIO SCIUNNACH
GIANCARLO SCARDIA
ISABELLA PREMOLI SILVA
MAASTRICHTIAN TO EOCENE CALCAREOUS NANNOFOSSIL BIOSTRATIGRAPHY FROM THE TABIAGO SECTION, BRIANZA AREA, NORTHERN ITALY
Rivista Italiana di Paleontologia e Stratigrafia
Calcareous nannofossils
Biostratigraphy
Maastrichtian
Paleocene
Eocene
Northern Italy
Lombardy
Cretaceous/Tertiary boundary
author_facet FABRIZIO TREMOLADA
DARIO SCIUNNACH
GIANCARLO SCARDIA
ISABELLA PREMOLI SILVA
author_sort FABRIZIO TREMOLADA
title MAASTRICHTIAN TO EOCENE CALCAREOUS NANNOFOSSIL BIOSTRATIGRAPHY FROM THE TABIAGO SECTION, BRIANZA AREA, NORTHERN ITALY
title_short MAASTRICHTIAN TO EOCENE CALCAREOUS NANNOFOSSIL BIOSTRATIGRAPHY FROM THE TABIAGO SECTION, BRIANZA AREA, NORTHERN ITALY
title_full MAASTRICHTIAN TO EOCENE CALCAREOUS NANNOFOSSIL BIOSTRATIGRAPHY FROM THE TABIAGO SECTION, BRIANZA AREA, NORTHERN ITALY
title_fullStr MAASTRICHTIAN TO EOCENE CALCAREOUS NANNOFOSSIL BIOSTRATIGRAPHY FROM THE TABIAGO SECTION, BRIANZA AREA, NORTHERN ITALY
title_full_unstemmed MAASTRICHTIAN TO EOCENE CALCAREOUS NANNOFOSSIL BIOSTRATIGRAPHY FROM THE TABIAGO SECTION, BRIANZA AREA, NORTHERN ITALY
title_sort maastrichtian to eocene calcareous nannofossil biostratigraphy from the tabiago section, brianza area, northern italy
publisher Università degli Studi di Milano
series Rivista Italiana di Paleontologia e Stratigrafia
issn 0035-6883
2039-4942
publishDate 2008-03-01
description Calcareous nannofossil biostratigraphic investigations have been carried out on samples collected from the Tabiago section, Brianza, northern Italy. This section records early Maastrichtian (CC23b nannofossil zone) to early Eocene (NP10 nannofossil zone) calcareous nannofossil assemblages. The Cretaceous-Tertiary transition is characterized by major changes in sedimentation rates and two likely stratigraphic gaps. The Cretaceous Brenno Formation was deposited with a high sedimentation rate (~20 m/m.y.), whilst the Tabiago Formation of Paleogene age records a drastic decrease (~10 m/m.y.). The absence of the CC26 zonal marker Micula prinsii may indicate a stratigraphic hiatus or an extremely condensed level in the latest Maastrichtian. However, only two samples have been collected and analyzed in this interval due to low exposure of the outcrop, and the absence of M. prinsii could be the result of diagenetic overprint or insufficient sampling. A stratigraphic hiatus or a very condensed interval corresponds to the upper part of NP1 nannofossil zone and PĄ foraminiferal Zone and P1a Subzone in the early Paleocene. The poor exposure of the outcrop prevents to precisely locate the zonal boundaries between NP4 and NP5 and between NP9 and NP10 and impedes the documentation of possible further stratigraphic gaps or condensed intervals.
topic Calcareous nannofossils
Biostratigraphy
Maastrichtian
Paleocene
Eocene
Northern Italy
Lombardy
Cretaceous/Tertiary boundary
url https://riviste.unimi.it/index.php/RIPS/article/view/6367
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