Results 21 to 30 of about 2,364 (193)
COARSE-CRYSTALLINE PYRITE OF CENTRAL TIMAN [PDF]
Минералогия, 2021 The results of mineralogical, geochemical, X-ray, isotopic and spectroscopic studies of coarse-crystalline pyrite (Kyvvozh Formation, Dimtem’el Creek, Central Timan) are presented. Pyrite is characterized by cubic habit and zonal Co distribution.
R.I. Shaybekov +5 more
doaj +1 more source
Papers in Palaeontology, Volume 9, Issue 6, November/December 2023., 2023 Abstract Fine‐grained, siliciclastic units of the >1642 ± 3.9 Ma late Palaeoproterozoic Limbunya Group, Birrindudu Basin host rich, well‐preserved organic‐walled microfossil assemblages that include members of total‐group eukaryotes. These assemblages include taxa characteristic of this interval such as Tappania plana and Satka favosa, as well as less ...
Leigh Anne Riedman +4 more
wiley +1 more source
Sedimentology, Volume 69, Issue 5, Page 2284-2318, August 2022., 2022 Abstract The sedimentary record of the Pahrump Group in Death Valley comprises well‐exposed successions of mixed carbonate and siliciclastic deposits. Despite the abundance of studies focussing on the depositional dynamics of mixed carbonate – siliciclastic deposition in the Phanerozoic, the record of similar Proterozoic examples is comparatively ...
Daniel Smrzka +7 more
wiley +1 more source
Constraints on the origins of iron silicide spherules in ultrahigh‐temperature distal impact ejecta
Meteoritics &Planetary Science, Volume 56, Issue 7, Page 1369-1405, July 2021., 2021 Abstract Terrestrially occurring iron silicide spherules, described in the geological literature for 160 years as cosmogenic and approved as “extraterrestrial” minerals by IMA CNMMN in 1984, so far have escaped any serious examination by meteoriticists.
Sergei Batovrin +5 more
wiley +1 more source
Correlation of Proterozoic-Phanerozoic deep wells sections targeting Aldan-Maya area petroleum potentiality estimation [PDF]
Нефтегазовая геология: Теория и практика, 2022 The article discusses the debatable issues of well log correlation of the Riphean, Vendian, Cambrian and Mesozoic sections, promising for the search for oil and gas in the Aldan-Maya potentially petroleum bearing region. The author's proposed correlation
Fomin A.M. +3 more
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New data on oil and gas potential of the Vychegda Trough
Georesursy, 2020 This article is devoted to the problem of studying the petroleum potential of the underexplored territories of the European part of Russia, in particular, the Vychegda trough.
Tatyana V. Karaseva +3 more
doaj +1 more source
A Cryptic Alternative for the Evolution of Hyphae
BioEssays, Volume 42, Issue 6, June 2020., 2020 The current view that hyphae evolved about 400 million years ago when plants and fungi colonized land is challenged. Recent recognition of a deep biosphere fossil record provides an alternative view on hyphae: one where the fundamental functions of hyphae developed in ancient cryptic habitats and already where adapted for a terrestrial life‐style when ...
Magnus Ivarsson +3 more
wiley +1 more source
Литосфера, 2020 Research subject. This article considers accessory minerals, which, unlike zircons, are present in the vast majority of common clastic rocks. Materials and methods.
L. V. Badida, A. V. Maslov, G. A. Mizens
doaj +1 more source
Геодинамика и тектонофизика, 2020 Among the Riphean–Vendian dyke complexes of the basic composition, which intersect the Precambrian strata of the Bashkirian meganticlinorium (Southern Urals), one of the most common is the Kurgas gabbro-dolerite complex dated to the Early – Middle ...
A. O. Khotylev +4 more
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Georesursy, 2020 The volcanics of the Navysh complex of the Lower Riphean Ai Formation in the Southern Urals are well studied petrochemically and dated by several methods.
Artur A. Krasnobaev +3 more
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