Results 11 to 20 of about 42,104 (227)

CALCAREOUS NANNOFOSSILS AT THE TRIASSIC/JURASSIC BOUNDARY: STRATIGRAPHIC AND PALEOCEANOGRAPHIC CHARACTERIZATION

open access: yesRivista Italiana di Paleontologia e Stratigrafia, 2016
In this work, calcareous nannofossils are identified for the first time in the uppermost Triassic sequence of the Lombardy Basin (Southern Calcareous Alps, Italy).
CINZIA BOTTINI   +5 more
doaj   +4 more sources

Hydrous Carbonatitic Liquids Drive CO2 Recycling From Subducted Marls and Limestones

open access: yesGeophysical Monograph Series, Page 209-221., 2020

This book is Open Access. A digital copy can be downloaded for free from Wiley Online Library.

Explores the behavior of carbon in minerals, melts, and fluids under extreme conditions

Carbon trapped in diamonds and carbonate-bearing rocks in subduction zones are examples of the continuing exchange of substantial carbon ...
Erwin Schettino, Stefano Poli
wiley  

+1 more source

Calcareous Nannofossil and Calpionellid calcification events across Tithonian – Berriasian time interval and low latitudes paleoceanographic implications. [PDF]

open access: yes, 2008
The Tithonian-Berriasian time interval is characterized by a major calcareous nannofossil speciation episode and by the appearance of calpionellid group: several genera and species first appear and evolve, showing an increase in diversity, abundance and ...
G. Andreini   +3 more
core   +2 more sources

Calcareous nannofossil biostratigraphy of the Lower–Middle Pleistocene boundary of the GSSP, Chiba composite section in the Kokumoto Formation, Kazusa Group, central Japan, and implications for sea-surface environmental changes

open access: yesProgress in Earth and Planetary Science, 2020
The Chiba composite section (CbCS), in the middle of the Boso Peninsula in central Japan, was ratified as the Global Boundary Stratotype Section and Point (GSSP) for the Lower–Middle Pleistocene boundary, accompanied by the Matuyama–Brunhes (M–B ...
Koji Kameo   +4 more
doaj   +1 more source

Stable isotope and calcareous nannofossil assemblage record of the late Paleocene and early Eocene (Cicogna section) [PDF]

open access: yesClimate of the Past, 2016
We present records of stable carbon and oxygen isotopes, CaCO3 content, and changes in calcareous nannofossil assemblages across an 81 m thick section of upper Paleocene–lower Eocene marine sedimentary rocks now exposed along the Cicogna Stream in ...
C. Agnini   +7 more
doaj   +1 more source

BIOSTRATIGRAPHY AND PALEOENVIRONMENTAL ANALYSIS OF THE LOWER MIOCENE QOM FORMATION (JAAM AREA, CENTRAL IRANIAN BASIN)

open access: yesRivista Italiana di Paleontologia e Stratigrafia, 2023
Lower Miocene sediments from a previously not investigated outcrop of the Qom Formation (Central Iranian Basin) were studied for their foraminiferal and calcareous nannofossil content.
BOTOND LÁZÁR   +5 more
doaj   +1 more source

Calcareous nannofossils of the Jurassic/Cretaceous boundary strata in the Puerto Escano section (southern Spain) — biostratigraphy and palaeoecology

open access: yesGeologica Carpathica, 2016
We obtained material from the Puerto Escano section (southern Spain) to study the Jurassic/Cretaceous (J/K) boundary interval. The same samples had already been processed for magnetostratigraphic studies and biostratigraphic zonation based on ...
Svobodová Andrea, Kośák Martin
doaj   +1 more source

CRETACEOUS MICROFOSSIL (FORAMINIFERA AND CALCAREOUS NANOFOSSILS) ASSEMBLAGES FROM THE SUBSURFACE MAGALLANES BASIN, TIERRA DEL FUEGO ISLAND, CHILE

open access: yesPublicación Electrónica de la Asociación Paleontológica Argentina, 2020
Foraminifera and calcareous nannofossils were studied in washed drill-cuttings of three wells from the Chilean sector of the Magallanes Basin. This contribution aims to identify, characterize and illustrate microfossil assemblages throughout the ...
Jens Michael Thissen   +1 more
doaj   +1 more source

Lithostratigraphy and biostratigraphy of the upper cretaceous succession of Southeastern Sinai, Egypt

open access: yesEgyptian Journal of Petroleum, 2011
The calcareous nannofossil of the Upper Cretaceous successions exposed at Taba and El sheikh Attia sections at Southeastern Sinai in Egypt have been studied to contribute in the understanding of lithostratigraphy and biostratigraphy.
Medhat M.M. Mandur
doaj   +1 more source

Calcareous nannofossils at the upper part of Gurpi Formation and the lower part of Pabdeh Formation at Arkavaz section, south east Ilam [PDF]

open access: yesJournal of Stratigraphy and Sedimentology Researches, 2019
In this study the Paleocene sediments have been investigated at the upper part of Gurpi Formation and the lower part of Pabdeh Formation at Arkavaz section in southeast of Ilam.
Saeedeh Senemari
doaj   +1 more source

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