Results 1 to 10 of about 438 (165)

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

Calcareous nannofossil records and the migration of the Agulhas Return Current during the last 40 kyr

Frontiers in Earth Science
The Agulhas Return Current (ARC) transports warm tropical and subtropical waters eastward into the southern Indian Ocean. It plays a crucial role in the oceanographic connections between the Indian, Atlantic, and Southern oceans.
Chunhui Tao, Ding Xuan, Tao Chunhui
exaly   +3 more sources

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

Rivista 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, FLAVIO JADOUL, MANUEL RIGO, MARIACHIARA ZAFFANI, CLAUDIO ARTONI, ELISABETTA ERBA   +5 more
doaj   +4 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

Biostratigraphical studies of the subsurface Paleogene sequence in Abu Gharadig Field, Western Desert, Egypt. [PDF]

Delta Journal of Science, 2023
Detailed study of the foraminifera and calcareous nannofossils in the Abu Gharadig wells, from the Paleocene to Middle Eocene limestones of the Apollonia Formation and the Late Eocene to Oligocene greenish-gray shale of the Daba"a Formation has led to ...
Hamza Khalil, A. Marzouk, T. Hamdy,
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