Results 11 to 20 of about 12,881 (199)

Large Igneous Provinces (LIPs) and Anoxia Events in “The Boring Billion”

open access: yesGeophysical Monograph Series, Page 449-486., 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.
Shuan‐Hong Zhang   +4 more
wiley  

+1 more source

Cultural and Chronological Complexes of the Beryozovaya Griva I Settlement in the Lower Kama Region

open access: yesАрхеология евразийских степей, 2023
The article analyzes the materials of one of the multilayer settlement monuments of the Primeval period, located in the Lower Kama region – Beryozovaya Griva I settlement. The materials of the settlement trace back several stages of its functioning.
Anton V. Shipilov
doaj   +1 more source

Turbinella Pyrum Shell Items аt Eurasian Archaeological Sites (the 3rd Millennium BС – 9th Century AD)

open access: yesПоволжская археология, 2020
The authors analyze a collection of unique items – disc plates, pendants and beads made of mollusk shells of the Turbinella pyrum species inhabiting the Indian Ocean, which was collected at Mazunino-type burial grounds in the Middle Kama region.
Goldina Rimma D. , Yasakov Viktor S.
doaj   +1 more source

Biklyan’ Settlement of the Initial Stage of the Migration Period in the Lower Kama Region

open access: yesПоволжская археология, 2021
The article examines the materials of the beginning of the Migration period from the Biklyan’ settlement, located in the Lower Kama region. The area of 100 m2 was excavated in 2018, where a rectangular structure slightly deepened into subsoil loam with a
Lyganov Anton V.   +4 more
doaj   +1 more source

A review of the chironomid fauna (Diptera: Chironomidae) in the Middle Volga basin within the Republic of Tatarstan, Russia [PDF]

open access: yesКавказский энтомологический бюллетень, 2023
Data on the fauna of chironomids in water bodies of various types in the Middle Volga region within the Republic of Tatarstan (Russia) are summurized.
T.A. Kondratieva, L.B. Nazarova
doaj   +1 more source

Chronology Issues of the Neolithic Cultures in the Volga-Kama Basin

open access: yesПоволжская археология, 2021
In the article, the questions of the chronology of the Neolithic cultures in the Volga-Kama basin are discussed. This discussion is based on the significant series of radiocarbon dates obtained on the different organic materials in several last years ...
Vybornov Alexander A.   +1 more
doaj   +1 more source

Novoilyinskaya Post-Neolithic culture in the Middle and Upper Kama River region

open access: yesSamara Journal of Science, 2019
This paper deals with the analysis of the materials from the Novoilyinskaya culture monuments in the Middle Kama River region, traces the issue history and determines how much is known about it. The main sources of the issue are given and their reliability is determined here.
Evgeniya Leonidovna Lychagina   +2 more
openaire   +2 more sources

Methodological Aspects of Studying Fortifications of Hillforts in the Volga-Kama Region of the Early Iron – Early Middle Age [PDF]

open access: yesPovolzhskaya Arkheologiya (The Volga River Region Archaeology), 2018
The paper considers the methodological aspects of comprehensive archaeological and geological-geomorphological studies of fortifications dating back to the Early Iron Age – Early Middle Ages. The authors determined that settlements with the remains of earthworks and dwellings located on headland platforms in the condition they have retained until the ...
Khisiametdinova Asia A.   +1 more
openaire   +2 more sources

The origin of organic emission in NGC 2071 [PDF]

open access: yes, 2014
Context: The physical origin behind organic emission in embedded low-mass star formation has been fiercely debated in the last two decades. A multitude of scenarios have been proposed, from a hot corino to PDRs on cavity walls to shock excitation. Aims:
Fich, M.   +4 more
core   +3 more sources

On the methanol emission detection in the TW Hya disc: the role of grain surface chemistry and non-LTE excitation [PDF]

open access: yes, 2017
The recent detection of gas-phase methanol (CH$_3$OH) lines in the disc of TW Hya by Walsh et al. provided the first observational constraints on the complex O-bearing organic content in protoplanetary discs. The emission has a ring-like morphology, with
Henning, Th.   +5 more
core   +1 more source

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