Results 21 to 30 of about 53,108 (242)

Calcareous nannofossils from the middle/upper Miocene succession of Pécs-Danitzpuszta, southern Hungary: cosmopolitan Paratethys and endemic Lake Pannon assemblages

open access: yesFoldtani Kozlony, 2021
Quantitative analyses on calcareous nannofossils were carried out on 109 middle/late Miocene (Sarmatian/ Pannonian) samples from the section at Pécs-Danitzpuszta sand pit (Hungary).
S. Ćorić
semanticscholar   +1 more source

Stratigraphy and Nannofossil Biozonation of Sarmord Formation on the Qaywan Anticline in Sulaymaniyah Governorate, Northern Iraq

open access: yesIraqi Geological Journal, 2021
The Sarmord Formation is one of the overlooked formations that require more investigations than that achieved before. There are many problems in its definition, age, stratigraphy and aerial distribution.
Kamal Haji Karim
doaj   +1 more source

Slimehead Size Through Time: Testing the Temperature-Size Relationship in Late Cretaceous Trachichthyidae. [PDF]

open access: yesEcol Evol
In this study, we use the extensive fossil record of the extinct Late Cretaceous Trachichthyid fish genus, Hoplopteryx, from the British Chalk Group to explore how this family responded to past climate change events. Our study is the first to demonstrate that seawater palaeotemperature, estimated from oxygen stable isotope values, is a significant ...
Griffiths CV   +4 more
europepmc   +2 more sources

Eocene to Oligocene nannofossils stratigraphy and environmental conditions in Izeh Province, Zagros Basin, East Tethys

open access: yesJournal of Palaeogeography, 2021
Data obtained from the calcareous nannofossils, distributed in the upper part of the Pabdeh Formation (Priabonian–Rupelian) and the lower part of the Asmari Formation (Chattian) in the Bid-Zard section, were used to investigate the Eocene to Oligocene ...
Saeedeh Senemari, Farah Jalili
doaj   +1 more source

Investigating bio-events and time expansion of Calcareous nannofossils in the upper part of the Gurpi Formation and lower part of the Pabdeh Formation, northwestern Shiraz [PDF]

open access: yesJournal of Stratigraphy and Sedimentology Researches, 2020
In this study, calcareous nannofossils are investigated in the upper part of the Gurpi Formation and lower part of the Pabdeh Formation at the Par-e Nobar section located in the northwest of Shiraz. The thickness of the studied section is about 41 m. The
Saeedeh Senemari, Behzad Saeedi razavi
doaj   +1 more source

Calcareous nannofossils anchor chronologies for Arctic Ocean sediments back to 500 ka

open access: yesGeology, 2020
Poor age control in Pleistocene sediments of the central Arctic Ocean generates considerable uncertainty in paleoceanographic reconstructions. This problem is rooted in the perplexing magnetic polarity patterns recorded in Arctic marine sediments and ...
M. O’Regan   +4 more
semanticscholar   +1 more source

Novel nannofossils extraction methods from paintings, coupled with GC–MS for provenance determination and binder analysis

open access: yesHeritage Science, 2022
The use of calcareous nannofossils for provenance analysis is a new-old topic for cultural heritage. Several studies have already mentioned it for ceramic, but less for paintings.
Victory Armida Janine Jaques   +4 more
doaj   +1 more source

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 assemblage in paintings chalk ground for provenance analysis: three original paintings compared to european source materials

open access: yesHeritage Science, 2023
Chalk has been used since Antiquity for various purposes, and since Gothic for preparatory layers of painted cultural heritage objects. Several materials are called chalk in Cultural Heritage, but this work especially focuses on chalk composed of ...
Victory Armida Janine Jaques   +1 more
doaj   +1 more source

The calcareous nannofossil Prinsiosphaera achieved rock-forming abundances in the latest Triassic of western Tethys: consequences for the δ13C of bulk carbonate [PDF]

open access: yesBiogeosciences, 2013
The onset of pelagic biomineralization was a milestone in the history of the long-term inorganic carbon cycle: as soon as calcareous nannofossils became major limestone producers, the pH and supersaturation state of the global ocean were stabilized (the ...
N. Preto   +4 more
doaj   +1 more source

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