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- Geology (6)
- Romania (6)
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- Earth Sciences (2)
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- Middle Miocene (2)
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- Ammogloborotalia (1)
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Articles 1 - 24 of 24
Full-Text Articles in Physical Sciences and Mathematics
Events, Bogdan P. Onac, Corina Ionescu
Thermo-Mineral Waters From The Cerna Valley Basin (Romania), Ioan Povara, Georgel Simion, Constantin Marin
Thermo-Mineral Waters From The Cerna Valley Basin (Romania), Ioan Povara, Georgel Simion, Constantin Marin
Studia UBB Geologia
In the south-west of the Southern Carpathians, upstream from the confluence of Cerna with Belareca, an aquifer complex has developed, strongly influenced by hydrogeothermal phenomena, acting within two major geological structures, the Cerna Syncline and the Cerna Graben. The complex consists mainly in Jurassic and Cretaceous carbonate rocks, as well as in the upper part of the Cerna Granite, highly fractured, tectonically sunken into the graben. As a result of the tectonic processes which occurred after the end of the Jurassic-Cretaceous sedimentation cycle, limestones may be encountered at 1100 m altitude in the Mehedinţi Mountains, at 150 ¬¬600 m in …
Examples Of Weathering And Deterioration Of Tertiary Building Stones At St. Michaels Cathedral In Cluj-Napoca (Romania), Roman Koch, Paul Calin Racataianu, Ioan I. Bucur
Examples Of Weathering And Deterioration Of Tertiary Building Stones At St. Michaels Cathedral In Cluj-Napoca (Romania), Roman Koch, Paul Calin Racataianu, Ioan I. Bucur
Studia UBB Geologia
St. Michaels Cathedral is one of the oldest Gothic architectural monuments in Cluj. It is built predominantly of Cenozoic (Eocene) limestones which were deposited on a shallow carbonate platform. They are composed of different facies and microfacies types with varying amounts of particles, matrix and cement. Limestones from the Baci quarry (Cluj Limestone), which is situated about 3 km from the centre of Cluj, were commonly used. The weathering features correspond to the microfacies types, to the position of the stones in the walls and to the exposure (east, south, west, and north), which controls the moisture/dry cycles. This interrelationship …
Microfacies Analysis Of Upper Eocene Shallow-Water Carbonates From The Rodnei Mountains (N Romania), Diana Sahy, Emanoil Sasaran, Tudor Tamas
Microfacies Analysis Of Upper Eocene Shallow-Water Carbonates From The Rodnei Mountains (N Romania), Diana Sahy, Emanoil Sasaran, Tudor Tamas
Studia UBB Geologia
A Priabonian carbonate ramp developed in the NW Rodnei Mountains as a part of a Paleogene sedimentary cover which overlies the metamorphic basement of the Eastern Carpathians. Two sections were sampled at different locations along the carbonate ramp. The deposits accumulated in a shallow environment, in which relative sea level change is seen as the main controlling factor of facies distribution. A shoreface → middle ramp → inner ramp transition was recorded in both sections. Associations of large benthic foraminifers and high siliciclastic input are the dominant features in the northern part of the ramp, while in the south corals …
Lower Cretaceous Calcareous Nannofossils From The Southern Apuseni Mountains, Romania, Ana-Maria Vulc
Lower Cretaceous Calcareous Nannofossils From The Southern Apuseni Mountains, Romania, Ana-Maria Vulc
Studia UBB Geologia
We investigated Lower Cretaceous calcareous nannofossils from Southern Apuseni Mts. The studied section from Bucium Cerbu quarry is characterized by flysch deposits (rhythmical interbedded marls and sandstones), which were assigned to the Căbeşti Formation. The studied nannofossil assemblages yielded a high diversity. The Early Aptian age of the studied deposits was assigned based on both the Tethyan and Boreal calcareous nannofossil zonations. Several reworked Valanginian nannofossils were also observed in the Early Aptian in situ nannofloras. The nannofloras are dominated by tethyan and cosmopolitan species. Besides Boreal species are also present. The presence of boreal taxa (e.g. Kokia borealis, K. …
Geochemical Sediments & Landscape; Cave Geology; Karst Hydrogeology And Geomorphology, Bogdan P. Onac
Geochemical Sediments & Landscape; Cave Geology; Karst Hydrogeology And Geomorphology, Bogdan P. Onac
Studia UBB Geologia
No abstract provided.
Events, Sorin Filipescu, Dana Pop
Ft-Raman And Ft-Infrared Investigations Of Archaeological Artefacts From Foeni Neolithic Site (Banat, Romania), Simona Cîntă Pînzaru, Dana Pop, Loredana Nemeth
Ft-Raman And Ft-Infrared Investigations Of Archaeological Artefacts From Foeni Neolithic Site (Banat, Romania), Simona Cîntă Pînzaru, Dana Pop, Loredana Nemeth
Studia UBB Geologia
An impressive collection of chert artefacts from the Foeni Neolithic archaeological site (Timiş County, Banat region, Romania) is hosted by the Banat Museum in Timişoara. A representative set of seven specimens was non-destructively investigated using FT-Raman and ATR-FT-IR spectroscopy. The research was carried out for checking if these readily-available, non-destructive, fast, and cheap methods, which do not require preliminary sample preparation could provide significant information for characterizing the mineral composition of chert artefacts. Based on vibrational data, it was confirmed that the raw material was represented by microcrystalline quartz and moganite, with local concentrations of accessory minerals (calcite, dolomite, and …
New Bryozoa From The Sarmatian (Middle Miocene) Deposits Of The Cerna-Strei Depression, Romania, Kamil Zágoršek, Lóránd Silye, Botond Szabó
New Bryozoa From The Sarmatian (Middle Miocene) Deposits Of The Cerna-Strei Depression, Romania, Kamil Zágoršek, Lóránd Silye, Botond Szabó
Studia UBB Geologia
A new species of the Sarmatian bryozoan, Crisia romanica sp. nov., is described from Sarmatian (Middle Miocene) sediments of the Cerna-Strei Depression, near Răcăştia, Romania. The new species differs from all other known species of Crisia by having a frontal elongated gonozooecium with a prominent oeciopore situated on a short oeciostome. Crisia romanica sp. nov. is accompanied by Annectocyma corrugata (REUSS, 1869) occurring in a section nearby. The bryozoans found indicate normal marine conditions in the Cerna-Strei Depression during the Sarmatian.
Biostratigraphy Of The Cenomanian-Turonian Boundary In The Eastern Carpathians (Dâmboviţa Valley): Preliminary Observations, Claudia Cetean, Ramona Balc, Michael A. Kaminski, Sorin Filipescu
Biostratigraphy Of The Cenomanian-Turonian Boundary In The Eastern Carpathians (Dâmboviţa Valley): Preliminary Observations, Claudia Cetean, Ramona Balc, Michael A. Kaminski, Sorin Filipescu
Studia UBB Geologia
Planktonic and benthic foraminiferal assemblages from an Upper Albian to Lower Turonian interval in the East Carpathians were investigated in a well and in an outcrop from the Stoeneşti – Cetăţeni area (Dâmboviţa Valley), Romania. The benthic foraminiferal extinction that occurred at the Cenomanian/Turonian boundary and the first stage of the faunal recovery are documented here for the first time in the Romanian Carpathians. Bioevents and changes in the foraminiferal record from this area show that low oxygen conditions occured already in the Late Cenomanian, as suggested by the presence of radiolarian-rich shales. Impoverished assemblages of small, thin walled agglutinated …
Plant Macrofossils Analysis From Steregoiu Nw Romania: Taphonomy, Representation, And Comparison With Pollen Analysis, Angelica N. Feurdean, Ole Bennike
Plant Macrofossils Analysis From Steregoiu Nw Romania: Taphonomy, Representation, And Comparison With Pollen Analysis, Angelica N. Feurdean, Ole Bennike
Studia UBB Geologia
This paper presents the results of macrofossil analysis from the Steregoiu sequence in the Gutaiului Mountains covering the last 8,000 cal BP. The studied peat deposit is characterized by abundant macrofossils. Their diversity is, however, low with most macrofossils coming from plants that grew on the mire and in the forest surrounding the basin (Carex spp., Cyperus sp., Urtica dioica, Potentilla erecta, Filipendula ulmaria, Rubus idaeus, Lycopus europaeus). The concentration of Picea abies macrofossils correlates partially well with its pollen percentages, and only when it has been present on the bog surface. The absence of macrofossils from deciduous trees, which …
Scărişoara. The Realm Of Scărişoara, Robert Brinkmann
Scărişoara. The Realm Of Scărişoara, Robert Brinkmann
Studia UBB Geologia
No abstract provided.
Mammut Borsoni (Hays 1834) From The Early Pliocene Of Husnicioara (Mehedinţi District, Romania), Vlad Codrea, Florina Diaconu
Mammut Borsoni (Hays 1834) From The Early Pliocene Of Husnicioara (Mehedinţi District, Romania), Vlad Codrea, Florina Diaconu
Studia UBB Geologia
A mastodon tooth has been found at Husnicioara coal open pit, in Mehedinţi district (southwestern Romania). It originates from the Lower Pliocene (Dacian) gravel and sand deposits lying just above the coal bed IV, mined in this quarry. The tooth exposing zygodont features undoubtedly belongs to Mammut borsoni (“Borson’s mastodont”). Although this species is very common in the Pliocene vertebrate faunas from this part of Europe, until now it was missing from the Lower Pliocene (Dacian) assemblage’s lists in our country.
On The Cretaceous Occurrences Of Ammogloborotalia Zheng, 2001 (Foraminifera), Michael A. Kaminski, Claudia Cetean, Andrew Henderson, Sorin Filipescu
On The Cretaceous Occurrences Of Ammogloborotalia Zheng, 2001 (Foraminifera), Michael A. Kaminski, Claudia Cetean, Andrew Henderson, Sorin Filipescu
Studia UBB Geologia
Three species of agglutinated foraminifera from Cretaceous deep-water deposits that have been described as trochamminids are here transferred to the genus Ammogloborotalia ZHENG, 2001. These species are Trochammina abrupta GEROCH, 1959; Trochammina quinqueloba GEROCH, 1959, and Ammoanita globorotaliaeformis Gradstein and Kaminski, 1999. A fourth species, Ammogloborotalia sp.1, which is probably a new species from the Turonian of the southern East Carpathians of Romania is reported here for the first time. We hereby extend the known stratigraphic range of the genus Ammogloborotalia to the Late Jurassic (Tithonian).
What Is Cczn-Armalcolite? A Crystal-Chemical Discussion And An Ad-Hoc Incursion In The Crichtonite-Minerals Group, Gavril Sabau, Augusta Alberico
What Is Cczn-Armalcolite? A Crystal-Chemical Discussion And An Ad-Hoc Incursion In The Crichtonite-Minerals Group, Gavril Sabau, Augusta Alberico
Studia UBB Geologia
The status of CCZN-armalcolite, commonly still believed to be a variety of armalcolite s.s., is questionable in view of partial evidence suggesting that it would represent a distinct phase, as initially claimed by its discoverers. Because of the rarity of the mineral, combined with its habitual small grain-size, no successful structural investigation could be undertaken so far. Therefore we attempted a chemical overview of existing and original data pertaining to CCZN-armalcolite. With the view of systematizing structure-composition relationships, we analyzed the topology of large cations – bearing close-packed oxides, while extending the nomenclature in use in order to accommodate further …
Uppermost Jurassic-Lower Cretaceous Carbonate Deposits From Fara San Martino (Maiella, Italy): Biostratigraphic Remarks, Roberta Bruni, Ioan I. Bucur, Alain Preat
Uppermost Jurassic-Lower Cretaceous Carbonate Deposits From Fara San Martino (Maiella, Italy): Biostratigraphic Remarks, Roberta Bruni, Ioan I. Bucur, Alain Preat
Studia UBB Geologia
The Uppermost Jurassic-Lower Cretaceous limestone succession in the Maiella region of Italy has been investigated in a profile covering more than 400 m stratigraphical thickness at Fara San Martino. The succession mainly consists of peritidal limestones, intertidal and supratidal sequences being dominant, together with subtidal lagoonal facies. As a consequence, the microfossil assemblages are generally poorly developed, Microfossils occur within the subtidal lagoonal facies of this suite of restricted sediments. This feature led us to recognise five informal biostratigraphic intervals, which are facies related – instead of biozones, each of the intervals being characterized by specific micropaleontological associations. The occurrence …
Biostratigraphy Of The Cretaceous Deposits In The Western Transylvanides From Ampoi Valley (Southern Apuseni Mountains, Romania), Ramona Balc, Erika Suciu-Krausz, Florin Borbei
Biostratigraphy Of The Cretaceous Deposits In The Western Transylvanides From Ampoi Valley (Southern Apuseni Mountains, Romania), Ramona Balc, Erika Suciu-Krausz, Florin Borbei
Studia UBB Geologia
The present study is an approach of the issues related to the biostratigraphy of the Western Transylvanides. The research provided exact age data for the Feneş Formation, Valea lui Paul Formation, Bozeş Formation and Râmeţi Formation. The age of the formations was established based on the calcareous nannoplankton assemblages in Barremian-Campanian range. The lithological features together with the new age data allowed us to modify the boundaries between formations; accordingly the knowledge on the structure of South Apuseni Mountains required changes, too. The new data also imply the modification of the existent geological maps of the region. Based on the …
Early Medieval Ceramics From The Viile Tecii Archaeological Site (Romania): An Optical And Xrd Study, Corina Ionescu, Lucretia Ghergari, Marius Horga, Gabriela Rădulescu
Early Medieval Ceramics From The Viile Tecii Archaeological Site (Romania): An Optical And Xrd Study, Corina Ionescu, Lucretia Ghergari, Marius Horga, Gabriela Rădulescu
Studia UBB Geologia
Mineralogical and petrographic studies of Early Medieval potshards exhumed in the Viile Tecii archaeological site (North Transylvania, Romania) show a ceramic body composed of a microcrystalline to amorphous matrix, various clasts and voids. The microscopical features and XRD patterns indicate that illitic-kaolinitic clays were used as raw materials, together with quartzitic sands as tempering material. The ceramic vessels were obtained with the potter’s wheel, but the fabric is only slightly oriented, due either to the fast modeling or to the coarseness of the clayish paste. The thermal alteration of mineral phases points to relatively high firing-temperatures, between 800 and 900°C.
The Sarmatian Vertebrates From Draxeni (Moldavian Platform), Vlad Codrea, Laurentiu Ursachi
The Sarmatian Vertebrates From Draxeni (Moldavian Platform), Vlad Codrea, Laurentiu Ursachi
Studia UBB Geologia
Middle Miocene (Sarmatian) vertebrates had been unearthed at Draxeni (Vaslui district). The site is located in the northern area of the Moldavian Platform. There, the sand belonging to Şcheia Formation (Bessarabian) is mined in a restricted open pit. This sand is related to a littoral environment (shoreface and foreshore). Some of its levels are rich in mollusc debris. Vertebrate remains, carried into the Bessarabian brackish basin are present too, but in smaller amounts. Mastodon, rhinoceros, hipparionine, tortoise remains had been collected there over several years. All teeth and bones are isolated and bear the marks of intensive rolling by waves …
Petrology And Geochemistry Of The Muntele Mare Granitoid (Northern Apuseni Mountains), Romania, Lucretia Ghergari, Cristina Maris
Petrology And Geochemistry Of The Muntele Mare Granitoid (Northern Apuseni Mountains), Romania, Lucretia Ghergari, Cristina Maris
Studia UBB Geologia
The paper brings new data on the petrography and geochemistry of the Muntele Mare Granitoid (MMG), from its northernmost outcropping area (Mănăstireni-Bedeci area, Gilău Massif, Apuseni Mountains), where MM\G is are actively quarried for quartz and feldspar that are used in the ceramics industry. The MMG mined in the Bedeci quarry has a pegmatitic hypidiomorphous – inequigranular fabric, and a low melanocratic index (ca. 7%). It consists of quartz, plagioclase (two generations: acidic andesine-basic oligoclase (34-35% An), and albite (9-11% An)), orthoclase ± perthite in various substitution stages by microcline (intermediary), as well as microcline maximum, muscovite and biotite. Accessories …
High-Temperature And “Exotic” Minerals From The Cioclovina Cave, Romania: A Review, Bogdan P. Onac, Herta S. Effenberger, Radu C. Breban
High-Temperature And “Exotic” Minerals From The Cioclovina Cave, Romania: A Review, Bogdan P. Onac, Herta S. Effenberger, Radu C. Breban
Studia UBB Geologia
This paper reports on the identification of four rare minerals in the phosphate deposit in Cioclovina Cave, Romania. Berlinite, AlPO4 and hydroxylellestadite, Ca5[(Si,P,S)O4]3(OH,F,Cl) are minerals that can form only at high temperatures, and would not be expected in a sedimentary environment. In this study we review the characteristics of berlinite and hydroxylellestadite from a heated sedimentary sequence in Cioclovina Cave (Romania) and refine their structure from single-crystal X-ray data. Two other minerals, churchite-(Y), YPO4⋅2H2O and foggite, CaAl(PO4)(OH)2⋅H2O are, for the first time, described from a cave environment. The minerals were documented by means of single-crystal X-ray investigations, X-ray powder diffraction, …