Results 1 to 10 of about 402 (147)

Integrated biostratigraphy of the Maastrichtian-Danian sequence in the southern Tethys with insights into paleoenvironmental implications [PDF]

Scientific Reports
The Cretaceous-Paleogene (K/Pg) sequence offers a global perception of the paleoecological evolution in the southern Tethys realm. High-resolution calcareous nannofossil and dinoflagellate cyst analyses were conducted on subsurface Maastrichtian-Danian ...
Ramadan M. El-Kahawy, Aya Raafat
doaj   +2 more sources

Lower Jurassic calcareous nannofossil taxonomy revisited according to the Neuquén Basin (Argentina) record [PDF]

Journal of Micropalaeontology, 2022
Standard Early Jurassic biostratigraphic studies were performed in the boreal and Tethys realms (western Europe and northern Africa), and biozonations from these areas are the most accurate of the world. Comparatively, investigations in the Pacific realm
M. Chaumeil Rodríguez, M. Chaumeil Rodríguez, E. Mattioli, E. Mattioli, J. P. Pérez Panera   +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

A New Calcareous Nannofossil Record from the Lower Jurassic of Kermanshah, Western Iran: Implications for Biostratigraphy and Evolutionary Reconstructions

Geosciences, 2022
Calcareous nannofossils are used here for the first time in order to establish a precise biostratigraphic framework for the Kermanshah Radiolarite Formation, an outcropping in Western Iran. The new data presented here challenge the previous tentative age
Asad Abdi, Emanuela Mattioli, Beatriz Bádenas   +2 more
doaj   +1 more source

Lower Eocene sedimentary succession and microfossil biostratigraphy in the central northern Caucasus basin

Geologica Acta, 2020
The lower Eocene sediments from the classical Paleogene section exposed along the Kheu River, northern Caucasus, southern Russia are here studied. This ca. 50m thick succession is lithologically contrasting: the lower and upper parts are composed by soft
E. Shcherbinina, A. Iakovleva, Yu. Gavrilov , O. Golovanova, N. Muzylöv   +4 more
doaj   +3 more sources

PALEOCLIMATIC INSIGHTS ON THE CENOMANIAN-TURONIAN OCEANIC ANOXIC EVENT (OAE2) FROM NORTHERN IRAQ BASED ON CALCAREOUS NANNOFOSSILS AND GEOCHEMICAL DATA

Iraqi Geological Journal, 2020
Calcareous nannofossils, mineralogical and geochemical investigations are carried out on the Cenomanian-Turonian boundary of the Gulneri Formation in the Azmir, Dokan and Degala sections, northern Iraq.
Al-Lhaebi, Safwan
doaj   +1 more source

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

Progress 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, Yoshimi Kubota, Yuki Haneda, Yusuke Suganuma, Makoto Okada   +4 more
doaj   +1 more source

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

Climate 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, D. J. A. Spofforth, G. R. Dickens, D. Rio, H. Pälike, J. Backman, G. Muttoni, E. Dallanave   +7 more
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BIOSTRATIGRAPHY AND PALEOENVIRONMENTAL ANALYSIS OF THE LOWER MIOCENE QOM FORMATION (JAAM AREA, CENTRAL IRANIAN BASIN)

Rivista 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, MOSTAFA FALAHATGAR, MEHDI SARFI, MĂDĂLINA-ELENA KALLANXHI, RAMONA BĂLC, Lorand Silye   +5 more
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Calcareous nannofossils of the Jurassic/Cretaceous boundary strata in the Puerto Escano section (southern Spain) — biostratigraphy and palaeoecology

Geologica 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