scholarly journals ON THE POSITION OF THE BOUNDARY BETWEEN THE MOSCOVIAN AND KASIMOVIAN GLOBAL STAGES OF THE CARBONIFEROUS IN THE DONETS BASIN

2021 ◽  
Vol 14 (1) ◽  
pp. 63-71
Author(s):  
Tamara I. Nemyrovska
Keyword(s):  
Lower Boundary ◽  
Donets Basin ◽  
Present Position ◽  
Precise Position ◽  
Index Species ◽  
Potential Index ◽  
Type Area ◽  
Extinction Event ◽  
Moscow Basin ◽  
Definition Of

Detailed new data on paleontology and stratigraphy were obtained in the process of fulfilling the tasks of the International Carboniferous Subcommission on definition of the scopes of the Moscovian and Kasimovian global stages and the precise position of the boundary between them. The analysis of these data has shown that the position of this boundary in the type  area and in the other regions needs the revision. Recently the investigation of the conodonts from the Moscovian–Kasimovian boundary deposits in the Donets Basin revealed that the boundary between the Moscovian and Kasimovian stages in the official Ukrainian Carboniferous Stratigraphic Scheme does not correspond to this boundary in the type area of these stages in the  Moscow Basin. To correct this situation the lower boundary of the Kasimovian in the Ukrainian Scheme must be downgraded by two conodont zones — Swadelina subexcelsa and Sw. makhlinae. To update this boundary in the type area to fulfill the task of the Carboniferous Subcommission four conodont species were proposed as potential index-species for the definition of the boundary between the Moscovian and Kasimovian global stages. These conodont species are as follows Sw. subexcelsa,  Idiognathodus sagittalis, I. turbatus and I. heckeli. One of these species, which is selected, will be used as a marker of the  studied boundary. None of these species is officially selected as a marker. If Sw. subexcelsa will be selected, the position of  the Moscovian–Kasimovian boundary will remain at the present position. In this case this boundary in the Donets Basin has to be downgraded by two conodont zones. If one of three Idiognathodus will be selected, this boundary in the type area will be   upgraded by one and a half regional substage. In the Donets Basin it will be upgraded by less than a cycle. Keywords: Carboniferous, stratigraphy, conodonts, extinction event, index-­species. 

scholarly journals Conodont association of the Bashkirian-Moscovian boundary interval of the Donets Basin, Ukraine

2018 ◽  
Vol 33 (1) ◽  
pp. 105 ◽  
Author(s):  
Tamara I. NEMYROVSKA ◽  
Keyi HU
Keyword(s):  
Lower Boundary ◽  
The Other ◽  
Donets Basin ◽  
Conodont Evolution ◽  
Biotic Events ◽  
Definition Of ◽  
Moscovian Stage ◽  
Stage D

Ten sections spanning the Bashkirian-Moscovian boundary interval were studied in the Donets Basin. Six of them contain most representative conodont and foraminifer associations. In this paper we focused on three the most complete sections that include stratigraphically important conodont species, which belong to the Declinognathodus, Idiognathoides, Idiognathodus, Neognathodus, “Streptognathodus”, Mesogondolella and Diplognathodus genera. The majority of those species are widely distributed, which makes the correlation to other areas reliable. Two biotic events in conodont evolution were discovered in these sections. Two conodont lineages established here are considered as potential markers for the definition of the lower boundary of the Global Moscovian Stage: D. marginodosus – D. donetzianus and Id. sulcatus sulcatus – Id. postsulcatus. The conodonts D. donetzianus and Id. postsulcatus, both proposed before as potential markers for the de? nition of the GSSP at the Bashkirian-Moscovian boundary, are described and compared to those from the other areas. The entry of D. donetzianus is updated and con? rmed to the top of the limestone K1 in both sections, the Zolota Valley and the Malo-Mykolaivka sections. The other proposals for the de???? nition of the lower Moscovian boundary by conodonts are discussed. Three conodont zones characterize the Bashkirian-Moscovian boundary interval. These are, in ascending order: the Id. tuberculatus – Id. fossatus Zone and D. marginodosus Zone from the upper Bashkirian, and D. donetzianus Zone from the lower Moscovian. They were recently described and shortly given in this paper.

Late Moscovian fusulinids from the “N” Formation (Donets Basin, Ukraine)

2013 ◽  
Vol 87 (1) ◽  
pp. 44-68 ◽  
Author(s):  
Rimma R. Khodjanyazova ◽  
Vladimir I. Davydov
Keyword(s):  
New Species ◽  
Sea Level ◽  
Donets Basin ◽  
Taxonomic Study ◽  
Evolutionary Trend ◽  
Type Area ◽  
Distributional Patterns ◽  
Moscow Basin ◽  
Three New Species

A fusulinoidean taxonomic study of the Gurkovo and Kalinovo sections allows us to refine the biostratigraphy of the poorly studied Myachkovian (upper Moscovian) strata of the “N” Formation in the Donets Basin. Three fusulinid biozones,Hemifusulina graciosa–Fusiella spatiosa,Fusulina cylindrica–Fusulinella pseudobocki, andFusulinella?kumpani, are proposed in the interval from the top of Limestone M10to the base of N3, and they are correlated with coeval strata in the historical type area of the Moscow Basin. A total of 33 fusulinid species and subspecies belonging to eight genera are described, including three new species:Hemifusulina gurkovensisn. sp.,Beedeina innaeformisn. sp., andFusulina sosninaen. sp. The main evolutionary trend in fusulinoidean morphology in the late Moscovian is the appearance of massive secondary deposits in the limestone of the “N” Formation.Specific temporal and distributional patterns of the Middle Pennsylvanian fusulinoidean assemblages indicate variations in sea level stand. Variations are cyclic, with periods ∼600,000–1,000,000 years. AHemifusulina-association indicates the beginning of transgression; the late transgression–high sea level stand is designated by theBeedeina–Neostaffella–Ozawainella–Taitzehoellaassemblage which is successively replaced by the most diverseFusulinella-dominant association, which occupied a progressively shallowing sea.The similarity of fusulinoidean assemblages in the Moscow and Donets Basins and their cognate evolution trends reveal a connection between both regions at least during Podolskian–Myachkovian time.

Revision of the March Formation (Tremadocian) in Southeastern Ontario

1973 ◽  
Vol 10 (7) ◽  
pp. 1140-1155 ◽  
Author(s):  
Ivor J. Bond ◽  
Robert G. Greggs
Keyword(s):  
Sedimentary Environment ◽  
Lower Boundary ◽  
Lower Paleozoic ◽  
Type Area ◽  
Reference Sections ◽  
Conodont Fauna ◽  
Definition Of ◽  
Stratigraphic Succession ◽  
Reference Section ◽  
Upper Boundary

Reference sections are proposed for the revised March Formation (Tremadocian) along the MacDonald–Cartier Freeway a few miles west of Brockville, Ontario. The sequence of the March Formation delineated by these sections yields nearly a complete stratigraphic succession for this formation in southeastern Ontario. The lithology, thickness, and sedimentary environment are described, and the known conodont fauna is recorded.The establishment of a nearly complete reference section allows better understanding of the March as represented in the type area west of Ottawa, Ontario and permits more precise definition of the upper and lower contacts of the formation. The upper boundary of the March Formation as revised coincides with a probable Tremadoc–Arenig boundary: the lower boundary, also lithologically distinct coincides with the abrupt first appearance of conodonts in the Lower Paleozoic succession in southeastern Ontario.

scholarly journals Upper Tithonian ammonites (Himalayitidae Spath, 1925 and Neocomitidae Salfeld, 1921) from Charens (Drôme, France)

2016 ◽  
Vol 67 (6) ◽  
pp. 543-559 ◽  
Author(s):  
Camille Frau ◽  
Luc G. Bulot ◽  
William A.P. Wimbledon ◽  
Christina Ifrim
Keyword(s):  
Species Distribution ◽  
Lower Boundary ◽  
Biometric Analysis ◽  
Faunal Assemblages ◽  
Index Species ◽  
Vertical Range ◽  
Spanish Populations ◽  
Range Of Variation

AbstractThis contribution focuses on the Perisphinctoidea ammonite taxa from the Upper Tithonian at Charens (Drôme, south-east France). Emphasis is laid on five genera that belong to the families Himalayitidae and Neocomitidae. We document the precise vertical range of the index-species Micracanthoceras microcanthum, and a comparative ontogenetic- biometric analysis sheds new light on its range of variation and dimorphism as compared to the bestknown Spanish populations. As herein understood, the lower boundary of the M. microcanthum Zone (base of the Upper Tithonian) is fixed at the FAD of its index species. The faunal assemblages and species distribution of the P. andreaei Zone are rather similar to those described at the key-section of Le Chouet as confirmed by the co-occurrence of the genera Protacanthodiscus, Boughdiriella and Pratumidiscus. New palaeontological evidence supports the view that the basal Neocomitidae Busnardoiceras busnardoi was derived from Protacanthodiscus andreaei in the upper part of the P. andreaei Zone.

The Nature of Ususfructus

1946 ◽  
Vol 9 (2) ◽  
pp. 159-170
Author(s):  
Kopel Kagan
Keyword(s):  
Great Difficulty ◽  
Roman Law ◽  
Present Position ◽  
Modern Times ◽  
The Subject ◽  
The One ◽  
Definition Of ◽  
The Right ◽  
Opening Statements ◽  
In Virtue Of

No satisfactory definition of Dominium in Roman Law has yet been achieved. Amongst English writers Austin many years ago found great difficulty in this question while in modern times Professor Buckland has written ‘it is thus difficult to define Dominium precisely.’ Again, Poste, dealing with Gaius' discussion of dominium, says that his opening statements are ‘deplorably confused.’ These examples are enough to indicate the condition, of uncertainty which prevails. In my submission this uncertainty exists mainly because the conception of ususfructus has never yet been explained adequately. Of Possessio it has been said ‘the definition of Possessio to give the results outlined is a matter of great difficulty. No perfectly correct solution may be possible,’ and this statement is generally accepted as a correct assessment of the present position in juristic literature. But here, too, in my opinion, the reason is again connected with usufruct, for the possessio of the usufructuary has not yet been adequately determined. Gaius (2.93) tells us ‘usufructuarius vero usucapere non potest; primuum quod non possidet, sed habet ius utendi et fruendi.’ Ulpian holds that he had possessio in fact (‘Naturaliter videtur possidere is qui usum fructum habet’ D.41.2.12). On this subject Roby says ‘the fructuary was not strictly a possessor and therefore if he was deprived from enjoying he had not a claim to the original interdict de vi but in virtue of his quasi-possessio a special interdict was granted him.’ Austin saw difficulty in the whole problem of possessio. He wrote ‘by Savigny in his treatise on possessio it is remarked that the possessio of a right of usufruct … resembles the possessio of a thing, by the proprietor, or by an adverse possessor exercising rights of property over the thing. And that a disturbance of the one possession resembles the disturbance of the other. Now this must happen for the reason I have already stated:—namely, that the right of usufruct or user, like that of property, is indefinite in point of user. For what is possession (meaning legal possession not mere physical handling of the subject) but the exercise of a right ?’

Recommendations for Kübler Index standardization

Clay Minerals ◽  
2015 ◽  
Vol 50 (3) ◽  
pp. 283-286 ◽  
Author(s):  
L.N. Warr ◽  
R. Ferreiro Mählmann
Keyword(s):  
Lower Boundary ◽  
Crystallinity Index ◽  
Round Table ◽  
Rock Fragment ◽  
Round Table Discussion ◽  
Working Definition ◽  
Kübler Index ◽  
Definition Of ◽  
Boundary Limits ◽  
Index Standardization

AbstractFollowing a round-table discussion at the Mid-European Clay Conference in Dresden 2014, new recommendations for illite ‘crystallinity’ Kübler index standardization have been agreed upon. The use of Crystallinity Index standards in the form of rock-fragment samples will be continued, along with the same numerical scale of measurement presented by Warr & Rice (1994). However, in order to be compatible with the original working definition of Kübler's (1967) anchizone, the upper and lower boundary limits of the Crystallinity Index Standard (CIS) scale are adjusted appropriately from 0.25°2θ and 0.42°2θ to 0.32°2θ and 0.52°2θ. This adjustment is based on an inter-laboratory correlation between the laboratories of Basel, Neuchâtel and the CIS scale. The details of this correction are presented in this first note, as discussed at the round-table meeting and will be further substantiated by a correlation program between CIS and former Kübler–Frey–Kisch standards.

Foraminiferal biostratigraphy of the Visean–Serpukhovian (Mississippian) boundary interval at slope and platform sections in southern Guizhou (South China)

2012 ◽  
Vol 86 (5) ◽  
pp. 753-774 ◽  
Author(s):  
John R. Groves ◽  
Wang Yue ◽  
Qi Yuping ◽  
Barry C. Richards ◽  
Katsumi Ueno ◽  
...  
Keyword(s):  
Guizhou Province ◽  
Reference Area ◽  
Type Area ◽  
Slope Deposits ◽  
Central United States ◽  
Moscow Basin ◽  
Stratotype Section ◽  
Foraminiferal Biostratigraphy ◽  
Serpukhovian Stage

The Visean–Serpukhovian boundary is not yet defined by a Global Stratotype Section and Point (GSSP) but it is recognizable operationally by the appearance of the conodont Lochriea ziegleri in the L. nodosa–L. ziegleri chronocline. Foraminiferal successions across this boundary in the type area of the Serpukhovian Stage (Moscow Basin, Russia), elsewhere in Russia and in the central United States suggest that the appearances of Asteroarchaediscus postrugosus, Janischewskina delicata, Eolasiodiscus donbassicus, and specimens controversially referred to “Millerella tortula” are reliable, auxiliary indices to the base of the Serpukhovian. In southern Guizhou Province, China, Visean–Serpukhovian rock sequences from slope and platform settings have yielded rich associations of conodonts and foraminifers, respectively. The Nashui section is a leading candidate for the Serpukhovian GSSP because its slope deposits contain an uninterrupted record of conodont occurrences including the L. nodosa–L. ziegleri transition. Foraminifers recovered from the Nashui section are comparatively rare and include none of the basal Serpukhovian indices. In contrast, the nearby Yashui section represents a platform interior setting in which foraminifers flourished and conodonts were nearly absent. The base of the Serpukhovian at Yashui is marked approximately by the appearance of “tortula-like” specimens. Although it is not possible to correlate biostratigraphically between the Nashui and Yashui sections, the occurrence of “tortula-like” specimens at the Yashui section allows correlation with the mid-Venevian Substage of the Moscow Basin at a level coinciding with the appearance of L. ziegleri. Together, the slope and platform sections comprise an informative biostratigraphic reference area for micropaleontologic characterization of the Visean–Serpukhovian boundary in southern Guizhou.

Inorganic Evolution: From Proto-Elements to Extinct Elements

2014 ◽  
Author(s):  
Marco Fontani ◽  
Mariagrazia Costa ◽  
Mary Virginia Orna
Keyword(s):  
Chemical Element ◽  
Chemical Elements ◽  
Point Of View ◽  
Mineral Deposits ◽  
Donets Basin ◽  
Prime Matter ◽  
The Russian Empire ◽  
Definition Of ◽  
The University ◽  
The 19Th Century

Pyotr Nikolaevich Chirvinsky (1880–1955), the eminent Russian geologist, is best known as the founder of the science of meteorology. In the 1920s, Chirvinsky became the director of the Donskoi Polytechnic at Novochercassk. He spent a great deal of time as a consultant for the mines scattered throughout the Russian empire: along the Donets Basin, on the Kola and Crimean peninsulas, on the northeastern slopes of the Caucasus, and in the enormously rich mineral deposits of the Urals. His major objective in this work was to establish connections between the chemical composition of terrestrial minerals and meteorites by studying the quantity of a mineral present in a given sample of rock and the physicochemical conditions leading to its formation. He insisted that meteorites be considered legitimate objects of study in petrology, and because they had been formed in heavenly bodies and not on earth, they might provide clues regarding the formation of elements from primal material. Chirvinsky had predecessors in this way of thinking, as we shall see. The concept of prime matter is very old, coming before the definition of a chemical element, but connected to the idea of the elements. Raymond Lull (ca. 1235–1315), in his book, De Materia, defined the concept of prime matter as an element in potentia in all possible substances. The idea was very acceptable to many alchemists up until the end of the 19th century. In 1800, Jakob Joseph Winterl (1732?–1809) was a famous physician and professor at the University of Nagyszombat, in present-day Hungary. He developed a vitalistic and dualistic concept that was, from a certain point of view, anti-Enlightenment, according to which all of the chemical elements would have originated from two immaterial principles: one male, andronia, and the other female, thelyke. Although Winterl’s speculations may have been based on doubtful or misinterpreted experimental evidence, many German chemists accepted his theory. The physicist Heinrich Pfaff (1773–1852) embraced Winterl’s theory with enthusiasm, as did the pharmacist Johann Friedrich Westrumb (1751–1819) who propagated the concepts of thelyke and andronia. The first problems occurred when Winterl was unsuccessful in experimentally proving his theory.

scholarly journals Aulacogens, the Donets Basin (Eastern Ukraine, Southwestern Russia), and the new classification of rifts: Towards a proper terminology

2012 ◽  
pp. 1-7
Author(s):  
Dmitry Ruban
Keyword(s):  
Broad Spectrum ◽  
Plate Tectonics ◽  
Present Knowledge ◽  
Donets Basin ◽  
New Classification ◽  
East European ◽  
Continental Rifts ◽  
Definition Of ◽  
Present Understanding

Some intra-cratonic basins are traditionally called ?aulacogens?. This term has persisted in the geoscience literature since its invention by Soviet geologists in the mid-20th century before the triumph of the plate tectonics, but its meaning has evolved. Attempts to change its meaning from descriptive to genetic have led to a broad spectrum of opinions on the definition of aulacogens. Some specialists related them to continental rifts, while others have restricted aulacogens to the only particular rift systems or peculiar stages in the evolution of young cratons. The Donets Basin is a typical aulacogen stretching across the southern margin of the East European Craton. A brief review of present knowledge of this basin shows that its nature is rather incompatible with the present understanding of aulacogens. Instead, the new classification of rifts offers a more precise terminology for its exact characteristics. It is suggested that the term ?aulacogen? should only be restricted to those basins for which it has been applied historically.

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