scholarly journals Neptunian dykes in the Middle Miocene reefs of western Ukraine: preliminary results

2012 ◽  
Vol 56 (4) ◽  
pp. 881-894
Author(s):  
Marek Jasionowski ◽  
Danuta Peryt ◽  
Tadeusz Marek Peryt
Keyword(s):  
Middle Miocene ◽  
Preliminary Results ◽  
Neptunian Dykes ◽  
Western Ukraine

Badenian (Middle Miocene) echinoids and starfish from western Ukraine, and their biogeographic and stratigraphic significance

2014 ◽  
Vol 64 (2) ◽  
pp. 224-264 ◽  
Author(s):  
Andrzej Radwański ◽  
Marcin Górka ◽  
Anna Wysocka
Keyword(s):  
Middle Miocene ◽  
Carpathian Basin ◽  
Early Miocene ◽  
Dynamic Events ◽  
Mass Occurrence ◽  
Western Ukraine ◽  
Sand Dollars

Abstract Echinoderms from the Badenian (Middle Miocene) of the Fore-Carpathian Basin of western Ukraine are facies restricted. The Mykolaiv Beds, stratigraphically older, yielded the starfish Astropecten forbesi (complete skeletons), two genera of sand dollars (Parascutella, Parmulechinus), and numerous other echinoids of the genera Psammechinus , Echinocyamus, Spatangus, Hemipatagus, Echinocardium, Clypeaster, Echinolampas, and Conolampas. The stratigraphically younger, calcareous Ternopil Beds yielded Eucidaris (complete coronae, isolated spines), Arbacina , Brissus, and Rhabdobrissus. Sixteen species of echinoids are distinguished and/or commented. A new brissid, Rhabdobrissus tarnopolensis sp. nov., is established. A mass occurrence of some species (Psammechinus dubius and Hemipatagus ocellatus) contrasts with that of mass aggregations (sand dollars and Echinocardium leopolitanum) by dynamic events in selected layers of proximal tempestites. Of special note is the occurrence of very small specimens, interpreted as juveniles (‘babies’) having been swept out of their restricted biotopes (‘nurseries’). Some species hitherto regarded as of Early Miocene age, and the problem of their persistence beyond the Fore-Carpathian Basin and/or migration into that basin during the Middle Miocene transgression are discussed.

Naticid gastropods from the middle Miocene of western Ukraine

Zootaxa ◽  
2019 ◽  
Vol 4700 (2) ◽  
pp. 151-195
Author(s):  
LUCA PEDRIALI ◽  
MAURIZIO SOSSO ◽  
BRUNO DELL’ANGELO
Keyword(s):  
Middle Miocene ◽  
Sem Images ◽  
Central Paratethys ◽  
Western Ukraine

The paper covers 11 species of naticid gastropods occurring in the lower Serravallian (Upper Badenian) strata of western Ukraine (Central Paratethys). The studied material (over 1,700 naticids) represents six genera and 11 species, of which eight are new: Cochlis odovychenorum, Cochlis ukrainensis, Tectonatica anistratenkorum, Tectonatica pseudoprietoi, Euspira sirenkoi, Payraudeautia ermesi, Payraudeautia sabrinae and Payraudeautia varovtsiana. Additionally, we have also identified Euspira protracta (Eichwald, 1830), Polinices staszici (Friedberg, 1923) and Sinum affinis (Eichwald, 1830). A lectotype of Sinum affinis is designated (ZISP 1/62208). Detailed descriptions of the protoconch and teleoconch morphology of the taxa involved, including SEM images, are presented. 

scholarly journals Early-Middle Miocene from Kotaphi hill section (Nicosia, Cyprus): preliminary biostratigraphy and paleoceanographic implications

2016 ◽  
Vol 47 (1) ◽  
pp. 62
Author(s):  
M. Athanasiou ◽  
M. Triantaphyllou ◽  
M. Dimiza ◽  
A. Gogou ◽  
I. Bouloubassi ◽  
...  
Keyword(s):  
High Resolution ◽  
Key Words ◽  
Middle Miocene ◽  
High Abundance ◽  
Common Occurrence ◽  
Calcareous Nannofossil ◽  
Preliminary Results ◽  
Marine Deposits ◽  
Total Absence ◽  
Calcareous Nannofossil Biostratigraphy

Calcareous nannofossil biostratigraphy from Kotaphi Hill section allowed not only the biostratigraphic zonation of the Miocene units but also provided evidence for a distinct warm phase known as the Middle Miocene Climate Optimum (MMCO). Kotaphi Hill section is located in Agrokipia village (Nicosia region, Cyprus) and consists of cyclic marine deposits of the Pakhna Formation. High resolution sampling has been conducted and 84 samples were collected. Preliminary results indicated that several important calcareous nannofossil events can be consistently recognized along the studied section. High abundances of Discoaster druggii and Highest occurrence (HO) of Sphenolithus procerus suggest the presence of NN2 biozone while, LO of Sphenolithus belemnos has been used to recognize the base of biozone NN3. Upwards, Lowest Common Occurrence (LCO) of Sphenolithus heteromorphus marked the NN3-4 boundary-level. Biozone NN4 in Kotaphi Hill section is featured by high abundance of S. heteromorphus whereas total absence of the species together with the LO of Helicosphaera walbedorfensis mark the Paracme Beginning (PB) of S. heteromorphus interval. High abundance of warm indicators such as Discoasterids, S. heteromorphus, S. moriformis and Helicosphaera carteri observed in our material may partly reflect the warm phase of MMCO. Key words: Agrokipia village, Pakhna Formation, Cyprus, Sphenolithus heteromorphus, Middle Miocene Climate Optimum.

Miocene burrows of the Ghost Crab Ocypode and their environmental significance (Mykolaiv Sands, Fore-Carpathian Basin, Ukraine)

2012 ◽  
Vol 62 (2) ◽  
pp. 217-229 ◽  
Author(s):  
Andrzej Radwański ◽  
Anna Wysocka ◽  
Marcin Górka
Keyword(s):  
Middle Miocene ◽  
Carpathian Basin ◽  
Environmental Significance ◽  
Ghost Crab ◽  
Western Ukraine ◽  
Littoral Habitats

ABSTRACTRadwański, A., Wysocka, A. and Górka, M. 2012. Miocene burrows of the Ghost CrabOcypodeand their environmental significance (Mykolaiv Sands, Fore-Carpathian Basin, Ukraine).Acta Geologica Polonica,62(2), 217-229. Warszawa. The huge lithosome of the Middle Miocene (Early Badenian) Mykolaiv Sands, developed at the external margin of the Fore-Carpathian Basin in western Ukraine, is recognized to represent a shallowing-up sequence. Special attention is paid to burrows of the Ghost CrabOcypodewhich are pantropical in present-day littoral habitats. In the Stratyn section, burrows of this type become a crucial tool in the interpretation of basin bathymetry, which starts from distal offshore depths, through the foreshore, to the backshore where theOcypodeburrows record a temporary break in sedimentation. Lithification of the sand layers and theOcypodeburrows subsequently progressed in beachrock mode. The Stratyn section demonstrates that the development of submerged shoals and/or emergent parts, throughout the huge mass of the Mykolaiv Sands, is probably responsible for their great variation in thickness in western Ukraine, which has long proved difficult to explain.

scholarly journals Limpet-shaped gastropods of the genus Diodora (Vetigastropoda: Fissurellidae) from the Middle Miocene of Western Ukraine

2017 ◽  
Vol 67 (2) ◽  
pp. 235-247
Author(s):  
Bruno Dell’Angelo ◽  
Maurizio Sosso ◽  
Olga Anistratenko ◽  
Vitaliy Anistratenko
Keyword(s):  
New Species ◽  
Mediterranean Basin ◽  
Middle Miocene ◽  
Statistical Approach ◽  
Sem Images ◽  
Central Paratethys ◽  
Marginal Part ◽  
Western Ukraine ◽  
Recent Species ◽  
A New Species

Abstract The genus Diodora Gray, 1821 is widely represented in the Middle Miocene of the Central Paratethys with specimens usually attributed to D. graeca (Linnaeus, 1758) or D. italica (Defrance, 1820), well-known recent species of the Atlantic / Mediterranean Basin. In samples from the Upper Badenian of Western Ukraine we found two clusters of Diodora specimens, showing a similarity with these species, but a review of shell diagnostic characters using a statistical approach has revealed their clear conchological separateness. The first species from Varovtsi and Horodok is attributed herein to D. nodosa (Eichwald, 1830), whereas the second species from Maksymivka is described as a new species, D. stalennuyi sp. nov. We consider that these molluscs inhabited the Polish-Ukrainian marginal part of the Late Badenian Basin. Detailed descriptions of the protoconch and teleoconch morphology of the taxa involved, including SEM images, are presented.

The O–C diagrams of minor planets − a new approach to modelling the rotation

1999 ◽  
Vol 173 ◽  
pp. 185-188
Author(s):  
Gy. Szabó ◽  
K. Sárneczky ◽  
L.L. Kiss
Keyword(s):  
Error Analysis ◽  
Time Dependence ◽  
Theoretical Work ◽  
Minor Planet ◽  
Minor Planets ◽  
New Approach ◽  
Preliminary Results ◽  
Ccd Observations

AbstractA widely used tool in studying quasi-monoperiodic processes is the O–C diagram. This paper deals with the application of this diagram in minor planet studies. The main difference between our approach and the classical O–C diagram is that we transform the epoch (=time) dependence into the geocentric longitude domain. We outline a rotation modelling using this modified O–C and illustrate the abilities with detailed error analysis. The primary assumption, that the monotonity and the shape of this diagram is (almost) independent of the geometry of the asteroids is discussed and tested. The monotonity enables an unambiguous distinction between the prograde and retrograde rotation, thus the four-fold (or in some cases the two-fold) ambiguities can be avoided. This turned out to be the main advantage of the O–C examination. As an extension to the theoretical work, we present some preliminary results on 1727 Mette based on new CCD observations.

Cyclic Evolution of Sunspots: Gleaning New Results from Old Data

2000 ◽  
Vol 179 ◽  
pp. 163-165
Author(s):  
S. K. Solanki ◽  
M. Fligge ◽  
P. Pulkkinen ◽  
P. Hoyng
Keyword(s):  
Sunspot Number ◽  
Sunspot Cycle ◽  
Preliminary Results ◽  
Butterfly Diagram

AbstractThe records of sunspot number, sunspot areas and sunspot locations gathered over the centuries by various observatories are reanalysed with the aim of finding as yet undiscovered connections between the different parameters of the sunspot cycle and the butterfly diagram. Preliminary results of such interrelationships are presented.

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