Results 31 to 40 of about 59,258 (240)

The essence of gypsum's influence on Tmax of source rocks: a case study of the Lower Ganchaigou Formation of Paleogene in western Qaidam Basin

open access: yesShiyou shiyan dizhi, 2023
Geological observation and thermal simulation experiments have revealed that the peak period of hydrocarbon generation of gypsum-bearing mudstone is often advanced in sedimentary basins, but the correlation between the amount of advance and the content ...
Wen QI   +7 more
doaj   +1 more source

Aporosa Blume from the paleoequatorial rainforest of Bikaner, India: Its evolution and diversification in deep time [PDF]

open access: yes, 2016
The Gondwanan origin, northward migration and subsequent collision with Asia means that the Indian subcontinent is of particular interest regarding the origin and dispersal of numerous plants and animal species.
Mehrotra, Rakesh C.   +3 more
core   +1 more source

A new xanthid crab, Neoliomera zovoensis sp. nov. (Decapoda, Brachyura), from the Lower Eocene beds of Zovo (Vestenanova, Verona, northeast Italy)

open access: yesGeologija, 2020
A new species of Neoliomera Odhner, 1925, Neoliomera zovoensis sp. nov. from the Lower Eocene (Ypresian) of Zovo (Vestenanova, Verona), which co-occurs with other decapod crustacean species in a richly fossiliferous coral-algal-reef in the Monti ...
Antonio DE ANGELI, Alessandro GARASSINO
doaj   +1 more source

Indigenous agglutinated foraminifera from the Eocene La Meseta Formation, Seymour Island, West Antarctica [PDF]

open access: yesPolish Polar Research, 2019
Here are reported the first certainly indigenous agglutinated foraminifera known for the Eocene La Meseta Formation on Seymour Island, West Antarctica. The specimens were identified as Textularia sp. and occur in the upper portion of the unit, just below
Victor C.S. Badaró
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

Tibet, the Himalaya, Asian monsoons and biodiversity - In what ways are they related? [PDF]

open access: yes, 2017
Prevailing dogma asserts that the uplift of Tibet, the onset of the Asian monsoon system and high biodiversity in southern Asia are linked, and that all occurred after 23 million years ago in the Neogene. Here, spanning the last 60 million years of Earth
An   +107 more
core   +2 more sources

The eruptive tempo of Deccan volcanism in relation to the Cretaceous-Paleogene boundary

open access: yesScience, 2019
Two timelines for extinction The Cretaceous-Paleogene extinction that wiped out the nonavian dinosaurs 66 million years ago was correlated with two extreme events: The Chicxulub impact occurred at roughly the same time that massive amounts of lava were ...
C. Sprain   +5 more
semanticscholar   +1 more source

Paleocene of Menat Formation, France, reveals an extraordinary diversity of orthopterans and the last known survivor of a Mesozoic Elcanidae [PDF]

open access: yesActa Palaeontologica Polonica, 2020
The orthopteran fauna of the Paleocene of Menat Formation (France) is revised. It comprises at least 12 species in the following clades: Grylloidea (an undescribed species, Menatgryllus longixiphus gen. et sp.
Thomas Schubnel   +4 more
doaj   +1 more source

The formation of authigenic deposits during Paleogene warm climatic intervals: a review

open access: yesJournal of Palaeogeography, 2020
Although Paleogene warm climatic intervals have received considerable attention for atmospheric and oceanographic changes, the authigenic mineralization associated with these time spans remains overlooked.
Santanu Banerjee   +3 more
semanticscholar   +1 more source

An effective palynological preparation procedure using hydrogen peroxide [PDF]

open access: yes, 2007
Most pre-Quaternary palynology samples are currently prepared by demineralization of the sediment/sedimentary rock matrix using hydrochloric and hydrofluoric acids (HCl and HF respectively).
Kyffin-Hughes, Jane E.   +2 more
core   +2 more sources

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