Results 31 to 40 of about 447 (181)

NEW CALCAREOUS NANNOFOSSIL DATA ON THE CRETACEOUS-EOCENE AGE OF CORSICAN TURBIDITES

Rivista Italiana di Paleontologia e Stratigrafia, 2017
A  detailed  biostratigraphical  study  based on  calcareous nannofossils  has been carried out on  the following Cretaceous-Eocene  flysch of Alpine Corsica:  Macinaggio Flysch, Tralonca  Flysch,  Vezzani Flysch,  Balagne Calcareous  Flysch,  Lydienne  (
MARIA MARINO, SIMONETTA MONECHI, GIANFRANCO PRINCIPI   +2 more
doaj   +1 more source

Biostratigraphy of the upper part of Aitamir Formation based on calcareours nannofossils, Cherli section (NW Kopet-Dagh) [PDF]

Journal of Stratigraphy and Sedimentology Researches, 2017
Introduction The Kopet-Dagh sedimentary basin is located in north-east Iran, southern Turkmenistan and Afghanistan and is composed of Mesozoic and Cenozoic sedimentary successions. Fifteen formations have been introduced in the Kopet-Dagh Basin.
Saeideh Senemari, Seyed Naser Raisossadat, Maryam Motamedalshariati, Mohsen Behroozy   +3 more
doaj   +1 more source

Biostratigraphy and Paleoecological Inferences Based on Oligocene Calcareous Nannofossils from the Ceará Rise (ODP Leg 154, Site 929A): Equatorial Atlantic Ocean [PDF]

Anuário do Instituto de Geociências, 2020
The Ceará Rise is an aseismic feature located in the Equatorial Atlantic Ocean, between the Amazon Cone, Demerara Abyssal Plain and the Ceará Abyssal Plain, which represents a key area for the understanding of deep ocean facies. In the oil and gas field,
Anaiza Claudia Meira Devellard Fionda, André Luiz Gatto Motta, Claudia Maria Magalhães-Ribeiro, Flávia Azevedo Pedrosa Lemos, Maria Dolores Wanderley   +4 more
doaj   +1 more source

Bio- and Sequence Stratigraphy of Upper Cretaceous – Palaeogene rocks, East Bahariya Concession, Western Desert, Egypt

Geologia Croatica, 2012
This work deals with the plankton stratigraphy of the subsurface Upper Cretaceous-Palaeogene succession of theEast Bahariya Concession based on planktonic foraminifera and calcareous nannofossils.
Mohamed Mahsoub, Radwan Abulnasr, Mohamed Boukhary, Mahmoud Faris, Mohamed Abd El Aal   +4 more
doaj   +1 more source

Calcareous Nanofossil of Post-Gondwana Sequence in Southern Banda Arc, Indonesia

JGEET: Journal of Geoscience, Engineering, Environment and Technology, 2021
The presence of calcareous nannofossils in samples of the Post-Gondwana sequences (Kolbano and Viqueque sequence) gives guidance about the relative age of the study area located in the Outer Banda Arc, namely Timor, Rote, and Sawu Island.
Angga Jati Widiatama, Lauti Dwita Santy, Rikza Nur Faqih An Nahar, Zulfiah, Winda Eka Mandiri Puteri, Adrianus Damanik, Rubiyanto Kapid   +6 more
doaj   +1 more source

Event Deposits Recorded Over the Past 800 kyr in IODP Hole U1433A (South China Sea): Implications of a Revised Methodology for Chronology and Paleoclimate Reconstruction

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 8, August 2026.
Abstract Instantaneous event deposits such as turbidites, debrites, and slumps are common and frequently occur in marginal seas. These instantaneous deposits represent seconds to days in duration, and can therefore significantly impact age‐depth models and interpretation of paleoclimate history based on thick sedimentary sequences recovered in deep ...
Xunpeng Li, Shuang Sun, Yuwei Zhang, Ziqiang Mao, Lina Jin, Yulong Zhao, G. Ian Alsop, Zhifei Liu, Yin Lu   +8 more
wiley   +1 more source

Climate conditions on the South‐Iberian Palaeomargin during the latest Pliensbachian to early Toarcian: A mineralogical and geochemical study from hemipelagic deposits

Sedimentology, Volume 73, Issue 5, Page 1631-1663, August 2026.
ABSTRACT The integrated analysis of lithofacies, mineralogy and geochemistry of the hemipelagic marine succession exposed in La Cerradura section (South‐Iberian Palaeomargin) provides new information to characterise the palaeoenvironmental conditions during the latest Pliensbachian to early Toarcian, including the Jenkyns Event.
Chaima Ayadi, Isabel Abad, Elisa Laita, Ali Mokhtar Samet, Matías Reolid   +4 more
wiley   +1 more source

Evidence of Cheliped Autotomy and Regeneration in the Lower Miocene Crab Achelous monspeliensis From Portugal

Ecology and Evolution, Volume 16, Issue 7, July 2026.
Crab autotomy with evidence of regeneration is described for the first time in the fossil record. Autotomy is a defensive behavior that affects more males than females of Achelous monspeliensis and may be related to mating season. ABSTRACT Autotomy—the voluntary shedding of a limb as a defensive response to predation, intraspecific aggression, or ...
Carlos Neto de Carvalho, Pedro Marrecas
wiley   +1 more source

DINOFLAGELLATE CYSTS AND CALCAREOUS NANNOFOSSILS FROM THE UPPER CRETACEOUS SARACENO FORMATION (CALABRIA, ITALY): IMPLICATIONS ABOUT THE HISTORY OF THE LIGURIDE COMPLEX

Rivista Italiana di Paleontologia e Stratigrafia, 2003
Organic-walled dinoflagellate cysts and calcareous nannofossils recovered from the turbidites of the Saraceno Formation outcropping in the type area (north-eastern Calabria, Italy) are presented. They provide new information about the age of the Saraceno
STEFANO TORRICELLI, MARIA ROSA AMORE
doaj   +1 more source

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

Publicación 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, Juan Pablo Pérez Panera   +1 more
doaj   +1 more source