Results 11 to 20 of about 19,060 (240)

Large Igneous Province Record Through Time and Implications for Secular Environmental Changes and Geological Time‐Scale Boundaries

open access: yesGeophysical Monograph Series, Page 1-26., 2021

Exploring the links between Large Igneous Provinces and dramatic environmental impact

An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Richard E. Ernst   +8 more
wiley  

+12 more sources

Jurassic to Paleogene: Part 2 Paleogene geochronology and chronostratigraphy [PDF]

open access: yesGeological Society, London, Memoirs, 1985
Summary We present a revised Paleogene geochronology based upon a best fit to selected high temperature radiometric dates on a number of identified magnetic polarity chrons (within the late Cretaceous, Paleogene and Neogene) which minimizes apparent accelerations in sea-floor spreading.
Berggren, William A.   +2 more
openaire   +4 more sources

The Paleogene Period [PDF]

open access: yes, 2012
ABSTRACT All Paleocene stages (i.e., Danian, Selandian and Thanetian) have formally ratified definitions, and so have the Ypresian and Lutetian Stages in the Eocene, and the Rupelian Stage in the Oligocene. The Bartonian, Priabonian and Chattian Stages are not yet formally defined.
N. Vandenberghe   +7 more
core   +7 more sources

Depositional models of lacustrine evaporites in the SE margin of the Ebro Basin (Paleogene, NE Spain) [PDF]

open access: yes, 2007
An important evaporitic sedimentation occurred during the Paleogene (Eocene to lower Oligocene) in the Barberà sector of the southeastern margin of the Tertiary Ebro Basin.
Inglès i Urpinell, Montserrat   +9 more
core   +8 more sources

A Window onto the Eocene (Cenozoic): The Palaeontological Record of the Sobrarbe-Pirineos UNESCO Global Geopark (Huesca, Aragon, Spain) [PDF]

open access: yesGeoconservation Research, 2021
The Sobrarbe-Pirineos UNESCO Global Geopark, located in the Central Pyrenees, is a region of remarkable geodiversity that includes extensive Eocene fossil-bearing sites and constitutes an important archive of paleobiodiversity.
Jose Canudo   +11 more
doaj   +1 more source

Investigating bio-events and time expansion of Calcareous nannofossils in the upper part of the Gurpi Formation and lower part of the Pabdeh Formation, northwestern Shiraz [PDF]

open access: yesJournal of Stratigraphy and Sedimentology Researches, 2020
In this study, calcareous nannofossils are investigated in the upper part of the Gurpi Formation and lower part of the Pabdeh Formation at the Par-e Nobar section located in the northwest of Shiraz. The thickness of the studied section is about 41 m. The
Saeedeh Senemari, Behzad Saeedi razavi
doaj   +1 more source

Multispecies leatherback turtle assemblage from the Oligocene Chandler Bridge and Ashley formations of South Carolina, USA [PDF]

open access: yesActa Palaeontologica Polonica, 2020
Paleogene dermochelyid species richness far exceeded that of today. Leatherback sea turtles were most species rich in the Paleogene, but their richness declined sharply during the Neogene with only one species existing today, Dermochelys coriacea.
Bailey R. Fallon   +1 more
doaj   +1 more source

NEW SEVEN COARSE-GRAINED PALEOGENE TETHYAN AGGLUTINATED FORAMINIFERAL SPECIES ON BOTH SIDES OF THE ATLANTIC OCEAN [PDF]

open access: yesScience Heritage Journal, 2023
The modern taxonomical consideration is used for seven coarse-grained agglutinated benthic foraminiferal species which are belonging to six genera from four countries in the Tethys around the Atlantic Ocean USA and Europe (Spain, France and Poland ...
Haidar Salim Anan
doaj   +1 more source

New evidence for the antiquity of Desmostylus (Desmostylia) from the Skooner Gulch Formation of California

open access: yesRoyal Society Open Science, 2023
Desmostylus is an extinct marine mammal genus that belongs to Desmostylia, a clade of extinct herbivorous mammals. While desmostylian remains are widely reported from Paleogene and Neogene marine strata of the North Pacific Rim, occurrences of the genus ...
Kumiko Matsui, Nicholas D. Pyenson
doaj   +1 more source

The age sequence of the detrital zircons from the Guanyindian section in Longde, the northeastern margin of the Tibetan Plateau, and its geological significance

open access: yesDizhi lixue xuebao, 2021
The precise age of the strata at the northeastern margin of the Tibetan Plateau in the Paleogene-Neogene, and the initial time when the uplift of the Plateau affected its northeastern margin, have always been two main bone contentions among geologists ...
KOU Linlin   +4 more
doaj   +1 more source

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