Results 11 to 20 of about 66,668 (274)

Sedimentary Mercury Enrichments as a Tracer of Large Igneous Province Volcanism

open access: yesGeophysical Monograph Series, Page 247-262., 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.
Lawrence M. E. Percival   +3 more
wiley  

+10 more sources

Ordovician scientometrics [PDF]

open access: yesEstonian Journal of Earth Sciences, 2023
Scientometrics is a tool for studying the development of science to observe and analyse patterns that emerge from it. Our aim is to elucidate how the Ordovician has been studied through the years, through the perspective of the published papers, the main
Alysson Mazoni   +2 more
doaj   +2 more sources

Ordovician Bryozoa of Estonia [PDF]

open access: yesEstonian Journal of Earth Sciences, 2023
sessile colonial, filter-feeding animals, many of which possess hard carbonate skeletons of different morphology. The bryozoan faunas of the Ordovician of Estonia were studied early by famous naturalists such as Karl Eduard von Eichwald and Władisław ...
Andrej Ernst
doaj   +1 more source

Ordovician enigmatic sclerite-type elements from western Argentina: possible oldest axial components of alcyonacean octocorals [PDF]

open access: yesActa Palaeontologica Polonica, 2021
The unusual findings of Lower and Middle Ordovician tiny sclerite-type elements in the San Juan Formation of the Argentine Precordillera are described and analysed.
Marcelo G. Carrera   +3 more
doaj   +1 more source

Characteristics and evolution of microbial carbonate reservoirs in the Pingliang Formation on the southern margin of Ordos Basin

open access: yesShiyou shiyan dizhi, 2022
As an important type of hydrocarbon reservoir, microbial carbonate contains great amount of hydrocarbon resources. The recent discovery of industrial gas in the Majiagou Formation in the east-central part of the Ordos Basin indicates that this type of ...
Juntao ZHANG   +4 more
doaj   +1 more source

The Irish Ordovician brachiopod fauna: A taxonomic renaissance [PDF]

open access: yesEstonian Journal of Earth Sciences, 2023
Despite its small areal extent, the island of Ireland exposes eight Caledonian tectonic terranes; six of them contain Ordovician brachiopod assemblages. These terranes record the early phases and destruction of the Iapetus Ocean through the occurrence of
David A. T. Harper
doaj   +1 more source

The earliest cornulitid on the internal surface of the illaenid pygidium from the Middle Ordovician of Estonia [PDF]

open access: yesEstonian Journal of Earth Sciences, 2017
The earliest cornulitid Cornulites sp. appears in the Darriwilian (Lasnamägi Regional Stage) of Estonia. Internal annulation is present in all Middle Ordovician cornulitids and could be a plesiomorphic character for the group.
Olev Vinn, Ursula Toom, Mare Isakar
doaj   +1 more source

Fine characterization of Ordovician inner fault-controlled bodies in area A of Tarim Basin

open access: yesYouqi dizhi yu caishoulu, 2023
It is a major difficulty to accurately characterize the inner fault-controlled bodies in the exploration and development of fault-controlled oil and gas reservoirs because the fault-controlled bodies are diverse in reservoir space, complicated in ...
YANG Xinrui   +3 more
doaj   +1 more source

Differences in marine hydrocarbon accumulation between the eastern and western parts of Shunbei area, Tarim Basin

open access: yesShiyou shiyan dizhi, 2023
From the eastern to the western part of Shunbei area in the Tarim Basin, the accumulations of marine oil and gas obviously decrease with the exploration risks significantly increasing.
Lixin QI, Yong DING
doaj   +1 more source

Controlling factors for effective reservoir development of Ordovician Kelimoli Formation in western Ordos Basin

open access: yesShiyou shiyan dizhi, 2023
In recent years, some progress has been made in the exploration of Ordovician natural gas in the western Ordos Basin, among which, the Ordovician Kelimoli Formation has the highest degree of natural gas accumulation.
Huimin LI   +7 more
doaj   +1 more source

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