Results 31 to 40 of about 19,899 (236)

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

New Eocene South American native ungulates from the Quebrada de los Colorados Formation at Los Cardones National Park, Argentina [PDF]

open access: yesActa Palaeontologica Polonica, 2021
In the last few years, the Quebrada de Los Colorados Formation has become an important middle Eocene fossiliferous unit in Northwestern Argentina. In this unit, the South American native ungulates were until now only represented by the order Notoungulata,
Mercedes Fernández   +6 more
doaj   +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

REPRESENTATIVES OF SOME DIAGNOSTIC AGGLUTINATED FORAMINIFERAL GENERA OF THE SUBCLASS MONOTHALAMANA (BATHYSIPHON, ORBULINELLOIDES, REPMANINA, MILIAMMINA, AGGLUTINELLA, DENTOSTOMENIA, AMMOMASSILINA, PSAMMOLINGULINA) IN THE TETHYS [PDF]

open access: yesGeological Behavior, 2021
The present study deals with the paleontology, stratigraphy, paleogeography and paleoenvironment of the sixteen representatives of the Paleogene agglutinated benthic foraminifer Monothalamana of eight genera: Bathysiphon Sars, Orbulinelloides Saidova ...
Haidar Salim Anan
doaj   +1 more source

ON THE VARIABILITY OF TETHYIAN ROTALIID BENTHIC FORAMINIFERAL SPECIES OF THE GENUS BOLIVINOIDESELLA ANAN [PDF]

open access: yesActa Scientifica Malaysia
Six Maastrichtian-Paleogene small Rotaliid benthic foraminiferal species of the genus Bolivinoidesella Anan are distributed in many localities in the Tethyan Atlantic and Pacific Oceans.
Haidar Salim Anan
doaj   +1 more source

Reshaping the understanding of the paratethys using paleogeographic reconstructions and geochronology studies [PDF]

open access: yesGeološki Anali Balkanskoga Poluostrva
The history of the Paratethys and its inhabiting organisms was profoundly influenced by its connections with the Global Ocean. As the sea‐straits linking Paratethys with the ocean expanded, they integrated the Paratethys with the global ocean, causing ...
Popov Sergey V.   +2 more
doaj   +1 more source

Steadiness of the distribution of residual oil in the delta sequences of the Paleogene system of the Bohai Bay basin [PDF]

open access: yesНефтегазовая геология: Теория и практика, 2022
The deltas developed widely in several faulted basins in China. As a kind of important oil and gas reservoir, it is very necessary to make clear the internal architecture for prediction of the residual oil distribution in the late period of oilfield ...
Afanas'eva M.A., Chzhan Ee
doaj   +1 more source

Enrichment types and hydrocarbon composition characteristics of shale oil in the northern part of Dongpu Sag, Bohai Bay Basin: a case study of the third member of Paleogene Shahejie Formation of well Wen 410

open access: yesShiyou shiyan dizhi, 2022
To reveal the oil-bearing characteristics and hydrocarbon composition of shale oils in the third member of Shahejie Formation in the northern part of Dongpu Sag, Bohai Bay Basin, analysis and testing were carried out by the means of frozen-craching ...
Junying LENG   +7 more
doaj   +1 more source

Postcranial remains of basal typotherian notoungulates from the Eocene of northwestern Argentina [PDF]

open access: yesActa Palaeontologica Polonica, 2020
Notoungulates represent the most taxonomically diverse and temporally and geographically widespread group among South American native ungulates. Here, we analyze anatomical and systematic aspects of proximal tarsal bones recovered from the Lower and ...
Matías A. Armella   +6 more
doaj   +1 more source

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