Wyniki wyszukiwania - Biblioteka Nauki

1

Extensional tectonics during Maghrebides Chain building since late Miocene : examples from Northern Sicily

100%

Giunta G. , Nigro F. , Renda P.

Annales Societatis Geologorum Poloniae

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2000

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tom Vol. 70, No. 1

81-98

EN

The Northern Sicilian-Maghrebian Chain courses W-E from the Trapani Mts to the Peloritani Mts and is composed by a set of tectonic units deriving from the Miocene-Pleistocene deformation of the Northern African Continental Margin. Inside it three main geotectonic elements ("external", Sicilide and "Austroalpine") are present and outcrop juxtaposed with a W-E trend. The external element composes the more western Trapani, Palermo and Western Madonie Mts, the Sicilide composes the Eastern Madonie and Nebrodi Mts, while the "Austroalpine" composes the more eastern Peloritani Mts. The orogen shows a culmination in the Trapani Mts and a depression in the Peloritani Mts. The main plicative stages are relatable to late Oligocene-early Miocene from the more internal sectors, while the deformation of the more external sectors starts from early-middle Miocene. The Sicilian chain body is re-involved in tectonism since late Tortonian, which persists until the recent time. During this interval, the deformation of the Sicilian Chain continued by activation of fault systems with different displacements. In the present paper, an important extensional tectonic stage is recognised, starting from the Tortonian; it is supported by structural data and shows through several geological sections across the northern sectors of the Sicilian orogen. This deformation is of exceeded wedge critical taper values, controls the early stages of the Tyrrhenian Basin opening, and is represented by low-angle fault system, producing tectonic omissions in the stratigraphic sequence. The detachment fault system is subsequently displaced by a complicated grid of Plio-Pleistocene net- and strike-slip fault system that controls the genesis of tectonic depressions in the northern off-shore areas of the Sicilian Chain. This neotectonic system may be reconnect to a W-E trending simple shear system, which controls the more recent Tyrrhenian Basin development.

2

Late Miocene depositional units and syn-sedimentary deformation in the western Pannonian basin, Hungary

100%

Fodor L. I. , Sztanó O. , Magyar I. , Törő B. , Uhrin A. , Varkonyi A. , Csillag G. , Kover S. , Lantos Z. , Nemeth A. , Palotai M. , Tokes L.

Geologia Sudetica

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2014

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tom Vol. 42

14--15

3

K-Ar dating of the Miocene andesite intrusions, Pieniny Mts, West Carpathians, Poland

80%

Birkenmajer K. , Pecskay Z.

Bulletin of the Polish Academy of Sciences. Earth Sciences

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1999

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tom Vol. 47, nr 2-3

155-169

4

Neogene karst sinkhole and its deposits from Górażdże Quarry, Upper Silesia : archive for palaeoenvironmental reconstructions

70%

Szulc J. , Worobiec E.

Annales Societatis Geologorum Poloniae

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2012

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tom Vol. 82, No. 4

371–-385

EN

A sinkhole, developed in Middle Triassic limestones and filled with clastic and organic deposits, including lignite, was studied, in terms of its origin and age. The sinkhole represents a solution sinkhole, which originated through the subsidence of surficial deposits into an underlying cave system. The study permitted the recognition of three main stages of sinkhole evolution. During the initial stage, subterranean and surface karstification proceeded concurrently. As a result, a terra rossa cover developed at the surface and a cavern system was formed in the underlying bedrocks. During the second phase, both systems became connected and the soil cover subsided. This, in turn, involved the formation of a depression at the land surface and ponding of the drainage water. The pond was filled with plant debris, later giving rise to lignite formation. During the third and final stage, the sinkhole was filled with quartz sands with kaolinite, derived from eroded, Upper Cretaceous sandstones and marls. Results of pollen analysis from the sinkhole indicate the presence of mesophytic forests and show a significant role of riparian forests and herbaceous vegetation. The occurrence of abundant, freshwater algae and the pollen of aquatic plants evidences sedimentation of the infill in a water body (pond). The apparent dominance of arctotertiary and cosmopolitan, palaeofloristical elements, as well as the occurrence of only sparse, palaeotropical elements (mainly subtropical), indicate a warm-temperate climate (cooler than during the Early and Middle Miocene period). A comparison of the sporomorph association from the sinkhole with those from other Neogene sites provides evidence of its Late Miocene age (Late Pannonian–Early Pontian).

5

A new stratigraphic position of some Early Pleistocene deposits in central Poland

60%

Bujak Ł. , Woronko B. , Winter H. , Marcinkowski B. , Werner T. , Stachowicz-Rybka R. , Żarski M. , Woźniak P. P. , Rosowiecka O.

Geological Quarterly

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2016

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tom Vol. 60, No. 1

238--251

EN

A new borehole in Rożce (SW Mazovian Lowland) drilled in 2012, combined with a wide variety of research methods (palaeomagnetism, palynological analysis, studies of plant macroremains and textural features of deposits) shed new light on the age and stratigraphic position of the Early Pleistocene deposits, formerly assigned as the Lower Pleistocene. The study focuses on the deposits from 50.7-104.0 m depth, between glacial till of the Nidanian Glaciation (ca. 0.9 Ma) and the Poznań Clays (ca. 5.322 Ma). The deposits situated directly underneath the till (50.7-60.2 m) are related to the Nidanian Glaciation and show a reversed polarity and correlate with the end of the Matuyama Epoch. The deposits from 60.2-104.0 m depth were accumulated during the Early Pliocene, i.e. approximately 5.332-4.6 million years ago. They appear to correlate with the middle part of the Gilbert Palaeomagnetic Epoch and thus they are considerably older than previously thought. The cored section indicates a stratigraphic gap of about 3.5 Ma from the Lower Pliocene to the first advance of the Scandinavian ice sheets into Poland, which are thought to have occurred in the early Middle Pleistocene. The analysed deposits accumulated under variable climatic conditions showing two periods with significant aridity alternated with two periods of increased humidity. Deposits of the arid periods contain no pollen, butaeolian sand quartz grains are found. During periods of more humid climate the area was covered by various types of mixed forest.

6

K-Ar dating of the Miocene andesite intrusions, Pieniny Mts, West Carpathians, Poland

60%

Birkenmajer K. , Pecskay Z.

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1999

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tom 47

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nr 2-3

7

Insectivore mammals from the Late Miocene of the Republic of Moldova

51%

Rzebik-Kowalska B. , Lungu A.

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2009

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tom 52A

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nr 1-2

8

Stratigraphic evidence of a Late Maeotian (Late Miocene) punctuated transgression in the Tanais Palaeobay (northern part of the Eastern Paratethys, South-West Russia)

51%

Ruban D. A.

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tom Vol. 16, No. 3

169--181

EN

The Tanais Palaeobay was located in the northern periphery of the eastern Paratethys Sea during the Late Miocene. New data from the Safianovo section (Rostov Dome, South-West of Russia) confirm that skeletal limestones (coquinites) of the Merzhanovskaja Formation belong to the Congeria (Andrusoviconcha) amygdaloides navicula Zone of the upper Upper Maeotian (the Maeotian is a regional chronostratigraphic unit of the Upper Miocene). Correlation of reference sections of these Upper Maeotian deposits within the Rostov Dome results in pattern of the palaeobay transgression, which was punctuated. The relative importance of local and global controls on this trangsression is not yet clear.

9

Sexual dimorphism in perissodactyl rhinocerotid Chilotherium wimani from the Late Miocene of the Linxia Basin (Gansu, China)

51%

Chen S. , Deng T. , Hou S. , Shi Q. , Pang L.

Acta Palaeontologica Polonica

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2010

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tom 55

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nr 4

EN

Sexual dimorphism is reviewed and described in adult skulls of Chilotherium wimani from the Linxia Basin. Via the analysis and comparison, several very significant sexually dimorphic features are recognized. Tusks (i2), symphysis and occipital surface are larger in males. Sexual dimorphism in the mandible is significant. The anterior mandibular morphology is more sexually dimorphic than the posterior part. The most clearly dimorphic character is i2 length, and this is consistent with intrasexual competition where males invest large amounts of energy jousting with each other. The molar length, the height and the area of the occipital surface are correlated with body mass, and body mass sexual dimorphism is compared. Society behavior and paleoecology of C. wimani are different from most extinct or extant rhinos. M/F ratio indicates that the mortality of young males is higher than females. According to the suite of dimorphic features of the skull of C. wimani, the tentative sex discriminant functions are set up in order to identify the gender of the skulls.

10

Anisodontherium from the Late Miocene of north-western Argentina

51%

Brandoni D. , Powell J. E. , Gonzales O. E.

Acta Palaeontologica Polonica

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2012

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tom 57

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nr 2

EN

The fossil record of Megatheriinae (Tardigrada, Megatheriidae) in Argentina extends from the Colloncuran (Middle Miocene of Patagonia) to the Lujanian (Late Pleistocene–Early Holocene of the Pampean region). In the Late Miocene of north−western Argentina, Megatheriinae is represented by just three species belonging to a single genus, Pyramiodontherium. Here, we describe a partial mandible and the phalanges of a third digit of the manus recovered from the Saladillo Formation (Upper Miocene) of Tucumán Province, and assign them to Anisodontherium sp. Anisodontherium is primarily characterized by mesiodistally compressed molariforms, an anterior margin of the coronoid process located posterior to m4, and a posterior margin of the mandibular symphysis located anterior to m1. While these features can also be observed in A. halmyronomum from the Arroyo Chasicó Formation (Buenos Aires Province, Pampean region), Anisodontherium sp. is smaller and more slender than the former. The shape of each molariform of Anisodontherium affects the total length of the molariform tooth row, and thus the interpretation of some characters used in cladistic and paleobiological analyses. The material described here adds to the knowledge of the mandibular and dental anatomy of early megatheriines. In addition, the occurrence of Anisodotherium in Tucumán Province provides the first record of this genus outside the Pampean region, and increases the diversity of megatheriines during the Late Miocene–Pliocene of north−western Argentina.

11

Late Miocene bovids from Serefkoy-2 (SW Turkey) and their position within the sub-Paratethyan biogeographic province

51%

Kostopoulos D. S. , Karakutuk S.

Acta Palaeontologica Polonica

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2015

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tom 60

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nr 1

EN

We describe new fossil bovid craniodental remains from the Upper Miocene fossil site of Şerefköy-2, Yatağan Basin, SW Turkey. The new material belongs to six species: Gazella cf. G. capricornis, Palaeoryx pallasi, Sporadotragus parvidens, Skoufotragus cf. Sk. schlosseri, Urmiatherium rugosifrons, and ?Sinotragus sp., which together indicate a latest middle–early Late Turolian (Late Miocene) age. Medium-to-large bovid taxa prevail over small ones, and protoryxoid bovids clearly dominate the assemblage. An analysis of the taxonomic structure, size and diet spectra of several Turolian bovid assemblages from Greece and Turkey reveals Şerefköy-2 to be a member of a mammalian palaeocommunity particular to southwestern Anatolia, which in turn forms part of the sub-Paratethyan biogeographic province.

12

Late Miocene snakes [Reptilia: Serpentes] from Polgardi [Hungary]: a second contribution

51%

Venczel M.

Acta Zoologica Cracoviensia

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1998

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tom 41

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nr 1

13

The dental evidence on the differentiation of the ctenomyine rodents [Caviomorpha, Octodontidae, Ctenomyinae]

51%

Verzi D. H.

Acta Theriologica

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1999

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tom 44

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nr 3

EN

Primitive species in the differentiation of the subfamily Ctenomyinae are revisited, and, on molar evidence, a new interpretation of the evolutionary pattern of these earliest members of the group is proposed. The octodontid Phtoramys is rejected as possible ancestor, whereas the genus Chasichimys (including Pattersomys), previously included in the family Echimyidae, is transferred to the Octodontidae as a primitive member of the ctenomyine radiation. During the Chasicoan and Huayquerian Ages [Late Miocene), an anagenetic event represented by an increase of hypsodonty in Chasichimys, may have led to the differentiation of the primitive euhypsodont ctenomyines of the genus Xenodontomys. Coeval cladogenetic processes, occurring during the protohypsodont evolutionary stage of the group, would have resulted in the separation of the genus Palaeoctodon from the lineage Chasichimys-Xenodontomys. These ancient representatives of the subfamily would have differentiated in central Argentine pampas. The recognition of such evolutionary events and concordant evidence from other octodontoid rodents suggest temporal differences among the outcroppings of the Cerro Azul Formation in central Argentina.

14

The paleoecology of the Late Miocene mammals from the Optima Local Fauna of Oklahoma, USA

41%

Frederickson J. A. , Cohen J. E. , Engel M. H. , Hunt T. C. , Wilbert G. A. , Castaneda O. S. , Czaplewski N. J.

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tom 67

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nr 1

15

First record of an extinct marabou stork in the Neogene of South America

41%

Noriega J. I. , Cladera G.

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nr 4

EN

We describe a new large species of marabou stork, Leptoptilus patagonicus(Ciconiiformes, Ciconiidae, Leptoptilini), from the late Miocene Puerto Madryn Formation, Chubut Province, Argentina. The specimen consists mainly of wing and leg bones, pelvis, sternum, cervical vertebrae, and a few fragments of the skull. We provisionally adopt the traditional systematic scheme of ciconiid tribes. The specimen is referred to the Leptoptilini on the basis of similarities in morphology and intramembral proportions with the extant genera Ephippiorhynchus, Jabiru, and Leptoptilos. The fossil specimen resembles in overall morphology and size the species of Leptoptilos, but also exhibits several exclusive characters of the sternum, humerus, carpometacarpus, tibiotarsus, and pelvis. Additionally, its wing proportions differ from those of any living taxon, providing support to erect a new species. This is the first record of the tribe Leptoptilini in the Tertiary of South America.

16

Late Miocene potamarchine rodents from southwestern Amazonia, Brazil - with description of new taxa

41%

Kerber L. , Negri F. R. , Ribeiro A. M. , Vucetich M. G. , De Souza-Filho J. P.

Acta Palaeontologica Polonica

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2016

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tom 61

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nr 1

EN

The fossil rodents from the southwestern Amazonia of Brazil have been studied since the first half of the 20th century. Several caviomorph rodents were reported for the Neogene of this region, mainly neoepiblemids and dinomyids. Until recently, the record of dinomyids in the Solimões Formation (Late Miocene) was predominantly based on a few isolated teeth, which made it difficult to make more accurate taxonomic identifications due to the scarcity of diagnostic characters. Here, new remains, more complete than those previously reported, of potamarchine dinomyids from the Neogene of Brazil are described. A new species of Potamarchus and a new genus and species of a Potamarchinae are erected. In addition, new material of Potamarchus murinus and Potamarchus sp. is identified. These data suggest a higher diversity of dinomyids in in the western Amazonia than previously supposed.

17

New dormice records (Rodentia: Gliridae) from the Late Miocene of the Republic of Moldova

41%

Delinschi A.

Acta Zoologica Cracoviensia

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2013

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tom 56

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nr 2

EN

The Gliridae from three Late Miocene localities of the Republic of Moldova – Chimishliya (age MN12), Gura Galbene (MN12), and Gradishte (MN11/12) are described and their taxonomic position discussed: two are assigned to Myomimus, one each to Vasseuromys, Muscardinus and Gliridae gen. and sp. indet. The most abundant fossil remains were found in Chimishliya (nine teeth) and the most taxonomic diversity was observed in Gura Galbene (Myomimus dehmi/maritsensis, Myomimus sp., Muscardinus and Gliridae gen. and sp. indet). Discovery of the specimen of Muscardinus from Moldova fills the stratigraphic gap of genus occurrence between MN11 and MN14 in Europe. Scarcity of fossil remains does not allow for reconstruction of the transformations of the dormice fauna, though presence of particular genera is indicative of specific palaeoenvironment conditions in the Late Miocene of Moldova.

18

Late Miocene capybaras from Argentina: Skull anatomy, taxonomy, evolution, and biochronology

41%

Vucetich M. G. , Deschamps C. M. , Vieytes E. C. , Montalvo C. I.

Acta Palaeontologica Polonica

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2014

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tom 59

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nr 3

EN

Fossil capybaras are morphologically extremely varied, but previous studies have disagreed on whether this diversity reflects intraspecific variation or the existence of multiple species. Here, we review the capybaras from the classic Argentinian Late Miocene localities of Paraná River cliffs (“conglomerado osífero” of the Ituzaingó Formation, Entre Ríos), and Chillhué and Guatraché shallow lakes (Cerro Azul Formation, La Pampa), and perform a morphometric analysis of their upper cheek teeth and the posterior portion of the rostrum. Our results confirm that all of the specimens from the “conglomerado osífero” belong to the single species Cardiatherium paranense. In addition, we refer a specimen from Tupungato (Río de los Pozos Formation, Mendoza) to C. paranense, thus expanding its geographical range. The material from La Pampa represents a different taxon, and is here preliminary referred to Cardiatherium aff. orientalis. Our systematic interpretation of Late Miocene capybaras suggests that the early radiation of this group was not as explosive as previously thought, and was likely constrained by the early acquisition of large size, increasing complexity of the cheek teeth, and probably semi-aquatic habits.

19

Neogene radiolarian biostratigraphy and faunal evolution rates in the eastern equatorial Pacific ODP Sites 845 and 1241

41%

Kamikuri S.-I. , Motoyama I. , Nishi H. , Iwai M.

Acta Palaeontologica Polonica

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2009

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tom 54

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nr 4

EN

Radiolarians from Sites 845 and 1241 in the eastern equatorial Pacific were examined in order to evaluate the role of paleoceanographic perturbations upon the general faunal evolutionary pattern of tropical planktonic organisms during the last 17 Ma. Radiolarian appearance and extinction rates indicate no periods of mass extinctions during the past 17 Ma. However, a relatively rapid replacement of the species in the radiolarian assemblages occurs near the middle–late Miocene boundary. This replacement event represents the gradual extinction of a number of radiolarian species and their gradual replacement by evolving new species. The modern equatorial circulation system was formed near the middle–late Miocene boundary due to the closure of the Indonesian seaway. The minor faunal turnover appears to be associated with the formation of the modern equatorial circulation system near the middle–late Miocene boundary. Diatom assemblages in the equatorial Pacific became more provincial in character after about 9 Ma. The appearance and extinction rates of planktic foraminifers were relatively high near the middle–late Miocene boundary, and those of calcareous nannoplankton reached high values in the early late Miocene in the equatorial Pacific Ocean. Thus, faunal evolution from the middle Miocene type to late Miocene types occurred first, being followed by floral evolution. The middle–late Miocene boundary is not a sharp boundary for planktonic microfossils, but marks a time of transition critical for faunal and floral evolution in both siliceous and calcareous microfossil assemblages in the equatorial Pacific Ocean.

20

Early Paracamelus [Mammalia, Tylopoda] in Eastern Europe

41%

Titov V. V. , Logvynenko V. N.

Acta Zoologica Cracoviensia. Ser.A Vertebrata

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2006

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tom 49A

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nr 1-2