Zobrazeno 1 - 10
of 32
pro vyhledávání: '"M. M. Astafieva"'
Publikováno v:
Paleontological Journal. 55:447-454
The discovery of numerous bacterial remains (including those morphologically similar to modern ironbacteria) in the lower Proterozoic red-colored quartzites of Shoksha, Karelia, and Bolshoy Tyuters Island of the Gulf of Finland, indicates a significa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ce154b031a42e0faf4db10d98c1aa9ef
https://doi.org/10.1134/s003103012104002x
https://doi.org/10.1134/s003103012104002x
Autor:
M. M. Astafieva
Publikováno v:
Paleontological Journal. 55:343-354
Studies of fossil bacteria show that mineral formation affected by or involving bacteria has occurred everywhere on Earth since the emergence of bacteria. Homogeneity of rocks and rock formations in the Precambrian and Devonian indicate that similar
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0616e5979a90f01c26f368a87234d726
https://doi.org/10.1134/s0031030121030060
https://doi.org/10.1134/s0031030121030060
Autor:
M. M. Astafieva, L. V. Zaitseva
Publikováno v:
Paleontological Journal. 54:922-929
Interesting observations illustrating the process of transformation of some minerals of banded iron formations (BIF) were made while studying the Early Proterozoic jaspilites of the Kursk Magnetic Anomaly (KMA). Examples showing the process of sideri
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::61ab012f2ef825068e7714715a9e44ad
https://doi.org/10.1134/s0031030120080031
https://doi.org/10.1134/s0031030120080031
Autor:
M. M. Astafieva
Publikováno v:
Paleontological Journal. 54:215-219
This is the first report on the fossilized fibers found in the Archean banded manganese formations of the Chitradurga Greenstone Belt (2.8 Ga, South India), which are similar to the stalk fibers of modern Gallionella ferruginea Ehrenberg, 1838. We ha
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3eda7ab86bb7d0eb0dc312296d4e9aa3
https://doi.org/10.1134/s0031030120030028
https://doi.org/10.1134/s0031030120030028
Autor:
M. M. Astafieva, A. Yu. Rozanov
Publikováno v:
Paleontological Journal. 54:1-5
The earliest finds of probable eukaryotes in the oldest sediments of various regions are reviewed. It is possible that the first eukaryotes could have appeared as early as the Archean.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::509ded4643d62501cb1fa41c47b87275
https://doi.org/10.1134/s0031030120010086
https://doi.org/10.1134/s0031030120010086
Autor:
M. M. Astafieva
Publikováno v:
Paleontological Journal. 53:862-866
Various methods for the study of microfossils (AR-PR1) in macerates, thin sections, and fresh chips have been compared. Each method has its advantages and disadvantages. While working with thin sections, it is often impossible to trace the interrelat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::52280472f61e3ccb3a14cb18128fa9ed
https://doi.org/10.1134/s0031030119080033
https://doi.org/10.1134/s0031030119080033
Autor:
M. M. Astafieva
Publikováno v:
Paleontological Journal. 53:228-240
The article discusses materials on the Archean (4.0–2.5 Ga) microfossils of the Earth (Greenland, Australia, South Africa, and Fennoscandian Shield). The main emphasis is on the description of the finds of possible members of eukaryotes. Analysis o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b6d2e32cc37bb60023ffeaca30d8fb25
https://doi.org/10.1134/s0031030119030043
https://doi.org/10.1134/s0031030119030043
Autor:
M. M. Astafieva
Publikováno v:
Paleontological Journal. 52:1131-1147
The study of volcanogenic and volcanogenic–sedimentary rocks (Early Proterozoic pillow lava of Karelia and South Africa), where diverse fossilized bacteria (prokaryotes) and probably even eukaryotes shows that, during this early period, conditions
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::897bd0b9db62676447a3c4660331a755
https://doi.org/10.1134/s0031030118100052
https://doi.org/10.1134/s0031030118100052
Autor:
V. V. Balaganskii, M. M. Astafieva
Publikováno v:
Stratigraphy and Geological Correlation. 26:354-363
Nanobacteria, buried in situ, were discovered in the Early Precambrian paraschists (Keivy, Kola Peninsula). It is suggested that occurrence of nanobacteria indicates that a biological factor played a role in the formation of enclosing rocks.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::62abacdf647dbaf355e9dbabea5bd050
https://doi.org/10.1134/s0869593818030024
https://doi.org/10.1134/s0869593818030024
Publikováno v:
Paleontological Journal. 51:430-440
Probable microfossils, presumably of bacterial origin, were found in the banded iron formations of Karelia and the Kola Peninsula. The age of these formations is 2.7–2.8 Ga. Based on the organic carbon content and balance estimations it was establi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2fbfe135f724fe73d20c140c26281122
https://doi.org/10.1134/s0031030117040037
https://doi.org/10.1134/s0031030117040037