Results 21 to 30 of about 34,573 (203)

Gigantism in unique biogenic magnetite at the Paleocene-Eocene Thermal Maximum [PDF]

open access: yes, 2008
We report the discovery of exceptionally large biogenic magnetite crystals in clay-rich sediments spanning the Paleocene-Eocene Thermal Maximum (PETM) in a borehole at Ancora, New Jersey. Aside from previously-described abundant bacterial magnetofossils,
Guerquin-Kern, Jean-Luc   +12 more
core   +2 more sources

Asian gliriform origin for arctostylopid mammals [PDF]

open access: yes, 2006
A
A Sulimski   +28 more
core   +2 more sources

Calcareous nannofossils at the upper part of Gurpi Formation and the lower part of Pabdeh Formation at Arkavaz section, south east Ilam [PDF]

open access: yesJournal of Stratigraphy and Sedimentology Researches, 2019
In this study the Paleocene sediments have been investigated at the upper part of Gurpi Formation and the lower part of Pabdeh Formation at Arkavaz section in southeast of Ilam.
Saeedeh Senemari
doaj   +1 more source

UPPER CRETACEOUS-OLIGOCENE TETHYAN AGGLUTINATED BENTHIC FORAMINIFERAL SPECIES OF THE GENUS ARENOBULIMINA [PDF]

open access: yesGeological Behavior, 2023
The agglutinated test of the genus Arenobulimina has trochospirally enrolled, four or more chambers per whorl, aperture interiomarginal with a simple arch or loop, which has a comprising various species.
Haidar Salim Anan
doaj   +1 more source

Angiosperm pollen grains from the Cuayuca Formation (Late Eocene to Early Oligocene), Puebla, Mexico [PDF]

open access: yes, 2015
Systematic descriptions and illustrations of the best preserved angiosperm pollen grains (Monocotyledonae or Liliopsida: n= 7 and Dicotyledonae or Magnoliopsida: n= 41) recovered from Cuayuca Formation (late Eocene-early Oligocene), Puebla State ...
Martínez Hernández, Enrique   +2 more
core   +1 more source

Typification of the genus Zizyphoides Seward et Conway (Magnoliophyta, Trochodendraceae)

open access: yesActa Palaeobotanica, 2021
Type material of Paliurus colombii Heer, Populus arctica Heer, Hakea arctica Heer, and Hedera macclurii Heer from the Atanikerdluk locality (Paleocene, Greenland) was restudied based on the original collection, stored in the National Museum of ...
Anastasia A. Zolina   +2 more
doaj   +1 more source

Marine bivalve geochemistry and shell ultrastructure from modern low pH environments [PDF]

open access: yes, 2011
. Bivalve shells can provide excellent archives of past environmental change but have not been used to interpret ocean acidification events. We investigated carbon, oxygen and trace element records from different shell layers in the mussels Mytilus ...
Baggini, C   +8 more
core   +2 more sources

Stratigraphic range extension of the turtle Boremys pulchra (Testudinata, Baenidae) through at least the uppermost Cretaceous [PDF]

open access: yesFossil Record, 2022
New material of the derived baenid turtle Boremys pulchra from the Hell Creek Formation of Montana extends the stratigraphic range of the taxon through at minimum the latest Maastrichtian.
Brent Adrian
doaj   +3 more sources

Discussion and significance of evidence for Paleocene strata by drilling in Yingcuixuan area of Xihu Sag [PDF]

open access: yesYouqicang pingjia yu kaifa
The Xihu Sag of the East China Sea Shelf Basin is characterized by thick Cenozoic sediments. Extensive research has been conducted on the geological conditions and hydrocarbon accumulation of the Eocene, Oligocene, and Miocene strata, with limited ...
JIANG DONGHUI   +5 more
doaj   +2 more sources

A latest Cretaceous to earliest Paleogene dinoflagellate cyst zonation of Antarctica, and implications for phytoprovincialism in the high southern latitudes [PDF]

open access: yes, 2012
The thickest uppermost Cretaceous to lowermost Paleogene (Maastrichtian to Danian) sedimentary succession in the world is exposed on southern Seymour Island (65° South) in the James Ross Basin, Antarctic Peninsula.
Bowman, Vanessa C.   +4 more
core   +1 more source

Home - About - Disclaimer - Privacy