Results 71 to 80 of about 1,820 (158)

To reconstruction of the river’s categories which formed sedimentary basins of Riphean basins in the region of the Eastern European platform and modern south Urals juncture

open access: yesИзвестия высших учебных заведений: Геология и разведка, 2019
Information on the distribution of trace and rare-earth elements in the bottom sediments of estuarine zones of various river categories (large rivers, rivers draining water collections, composed of sedimentary or magmatic and metamorphic rocks, etc.) of ...
A. V. Maslov
doaj   +1 more source

The significance and provenance of stromatolitic clasts in a probable Late Precambrian diamictite in north-western Tasmania [PDF]

open access: yes, 1976
Two types of stromatolitic dolomite boulders occur in a diamictite of possibly late Precambrian age in northwestern Tasmania; they are the oldest Tasmanian fossils so far recorded.
Griffin, BJ, Preiss, WW
core   +2 more sources

Spatial distribution of major and trace elements in artificial lakes in Serbia: health risk indices and suitability of water for drinking and irrigation purposes. [PDF]

open access: yesEnviron Monit Assess, 2023
Marković G   +9 more
europepmc   +1 more source

Assessment of the contribution of Precambrian deposits in forming the petroleum potential of the eastern part of the Volga-Urals basin using results of modeling

open access: yesЗаписки Горного института
Consideration is given to results of geochemical analysis of organic matter and oils of the Proterozoic (the RF-V complex) and the Paleozoic (the pay intervals D2, D3, C1-2) of the eastern part of the Volga-Urals petroleum basin.
Dmitrii D. Kozhanov, Mariya Bolshakova
doaj  

THE ZIRCON CHRONOLOGY OF THE INTRUSIVE MAGMATISM OF THE KANIN PENINSULA

open access: yesИзвестия высших учебных заведений: Геология и разведка, 2018
The Kanin Peninsula is an elevated block of the Timan Ridge where Precambrian sedimentary-metamorphic sequences and magmatic  rocks, intruding them, form the Kanin Kamen Ridge.
V. L. ANDREICHEV   +3 more
doaj   +1 more source

A likely role for anoxygenic photosynthetic microbes in the formation of ancient stromatolites [PDF]

open access: yes, 2007
Although cyanobacteria are the dominant primary producers in modern stromatolites and other microbialites, the oldest stromatolites pre-date geochemical evidence for oxygenic photosynthesis and cyanobacteria in the rock record.
Bosak, T., Greene, S. E., Newman, D. K.
core   +1 more source

Riphean stratotype mudrocks composition and some paleoclimate quantitative characteristics

open access: yesLITHOSPHERE (Russia)
The object of research is Lower, Middle and Upper Riphean mudrocks in the stratotype area – southern Urals western slope Bashkirian megaanticlinorium. We analyzed major element oxides composition of the 154 samples selected from shales and mudstones.Research method.
O. Yu. Melnichuk, A. V. Maslov
openaire   +1 more source

Microfossils from the late Mesoproterozoic - early Neoproterozoic Atar/EI Mreiti Group, Taoudeni Basin, Mauritania, northwestern Africa [PDF]

open access: yes, 2017
The well-preserved Meso-Neoproterozoic shallow marine succession of the Atar/EI Mreiti Group, in the Taoudeni Basin, Mauritania, offers a unique opportunity to investigate the mid-Proterozoic eukaryotic record in Western Africa.
Beghin, J.   +6 more
core  

DETRITAL ZIRCONS FROM THE PRECAMBRIAN OF THE IGARKA UPLIFT (NORTHWESTERN SIBERIAN PLATFORM)

open access: yesГеодинамика и тектонофизика
Herein we report the results of LA-ICP-MS dating of detrital zircons from eight stratigraphic levels of the Proterozoic section of the Igarka uplift (northwestern Siberian Platform).
B. B. Kochnev   +5 more
doaj   +1 more source

Nature secondary quartzites of the island Bol’shoy Tyuters (Gulf of the Finland, Russia)

open access: yesЛитосфера, 2017
Territory Baltic shield is well understood and the identification of innovative geological formations rare stroke of luck. Thanks to the Russian Geographical Society in the summer of 2015 an integrated expedition to study the nature of the little-known ...
Evgenii N. Terekhov   +5 more
doaj   +1 more source

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