Results 21 to 30 of about 1,486 (212)

The Jurassic/Cretaceous boundary and high resolution biostratigraphy of the pelagic sequences of the kurovice section (Outer Western Carpathians, the northern Tethyan margin)

Geologica Carpathica, 2019
Microfacies and high resolution studies at the Kurovice quarry (Czech Republic, Outer Western Carpathians) on calpionellids, calcareous and non-calcareous dinoflagellate cysts, sporomorphs and calcareous nannofossils, aligned with paleomagnetism, allow ...
Svobodová Andrea, Švábenická Lilian, Reháková Daniela, Svobodová Marcela, Skupien Petr, Elbra Tiiu, Schnabl Petr   +6 more
doaj   +1 more source

Nannoplankton Assemblage Succession Throughout Cretaceous/ Tertiary Boundary in the “P” Well Section, Santos Basin, Brazil

Indonesian Journal on Geoscience, 2014
DOI: 10.17014/ijog.v6i1.115The massive change in calcareous nannoplankton assemblages throughout Cretaceous/Tertiary (K/T) boundary (65.5 M.a.) has been illustrated by several authors.
Panuju Panuju
doaj   +1 more source

Paleocene postgenetic Accumulation of Nannoplankton on the Phillipsite Minerals in Roo Rise, Indian Ocean

Indonesian Journal on Geoscience, 2014
DOI: 10.17014/ijog.v5i1.92The sample studied was derived from the base of core MD 982156, one of the boreholes obtained during the IMAGES Expedition. The expedition was carried out as a research cooperation between Indonesia and French Governments using ...
Mimin Karmini Adisaputra, Dida Kusnida
doaj   +1 more source

Productivity response of calcareous nannoplankton to Eocene Thermal Maximum 2 (ETM2) [PDF]

Climate of the Past, 2012
The Early Eocene Thermal Maximum 2 (ETM2) at ~53.7 Ma is one of multiple hyperthermal events that followed the Paleocene-Eocene Thermal Maximum (PETM, ~56 Ma).
M. Dedert, H. M. Stoll, D. Kroon, N. Shimizu, K. Kanamaru, P. Ziveri   +5 more
doaj   +1 more source

Calcareous nannoplankton dating of the Late Quaternary deposits in Greece and the eastern Mediterranean: Case studies from terrestrial and marine sites

Journal of Palaeogeography, 2015
The distribution and abundance of Emiliania huxleyi (E. huxleyi) assemblages in the marine sediments of the Aravonitsa Plateau, Greece, and from the eastern Mediterranean are used (1) to evaluate the calcareous nannoplankton NN21a and NN21b biozones and ...
Maria V. Triantaphyllou
doaj   +1 more source

Morphometric changes in two Late Cretaceous calcareous nannofossil lineages support diversification fueled by long-term climate change

Peer Community Journal, 2022
Morphometric changes have been investigated in the two groups of calcareous nannofossils, Cribrosphaerella ehrenbergii and Microrhabdulus undosus across the Campanian to Maastrichtian of the Zagros Basin of Iran.
Razmjooei, Mohammad Javad, Thibault, Nicolas   +1 more
doaj   +1 more source

Spermatophyta Molecular Clock: Time Drift and Recent Acceleration. [PDF]

Plant Environ Interact
Exponential increase in the base substitution rate in recent geologic time. ABSTRACT Angiospermae radiation is widely recognized as a mid‐Cretaceous event, but the adaptive radiation of Asarum and Viola as spring ephemerals also occurred during the Quaternary. To better understand the evolution of Angiospermae through geological time, a robust and well‐
Osozawa S.
europepmc   +2 more sources

CALCAREOUS NANNOPLANKTON OF CALLOVIAN OF UKRAINE

Collection of Scientific Works of the Institute of Geological Sciences of the NAS of Ukraine, 2013
Наведені дані вивчення вапняного нанопланктону з розрізів Дніпровсько-Донецької западини, Північно-Західного Донбасу, Гірського Криму. Аналіз поширення нанофосилій з вивчених розрізів, а також з розрізів Московської синеклізи, Саратовського Поволжя та Канівських дислокацій дозволяє виділити в келовеї дві нанопланктонні зони: Stephanolithuin hexum ...
Matveyev, A.V., Bondarev, D.S.
openaire   +3 more sources

Nannofossils from the Middle Eocene Sabiñánigo Sandstone Formation in the Jaca Basin (southern Pyrenees): biostratigraphy and paleoenvironmental implications [PDF]

Journal of Micropalaeontology
This study presents the first detailed data on calcareous nannofossil assemblages from the Sabiñánigo Sandstone Formation in the Jaca Basin (central south Pyrenees). This formation is mainly composed of deltaic and outer-shelf sediments.
E. R. Lasluisa, O. Oms, E. Remacha, A. González-Lanchas, H. Blanchar-Roca, J. A. Flores   +5 more
doaj   +1 more source

THE EARLY PLIOCENE MAMMAL ASSEMBLAGE OF VAL DI PUGNA (TUSCANY, ITALY) IN THE LIGHT OF CALCAREOUS PLANKTON BIOSTRATIGRAPHICAL DATA AND PALEOECOLOGICAL OBSERVATIONS

Rivista Italiana di Paleontologia e Stratigrafia, 2001
The stratigraphy of clayey and sandy beds outcropping in Val di Pugna locality near Siena (Tuscany, Italy) celebrated for the past finds of fossil mammalian remains, is studied here.
GIOVANNI BIANUCCI, PAUL MAZZA, DONATO MEROLA, GIOVANNI SARTI, ANTONIO CASCELLA   +4 more
doaj   +1 more source