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- Geology (3)
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- Upper Jurassic (2)
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Articles 1 - 14 of 14
Full-Text Articles in Physical Sciences and Mathematics
Morphological Specification Of Chinianella Scheympflugi Hofmann, 1994, A Late Jurassic (?Earliest Cretaceous) Dasycladalean Alga Of The Western Tethyan Domain, Felix Schlagintweit
Morphological Specification Of Chinianella Scheympflugi Hofmann, 1994, A Late Jurassic (?Earliest Cretaceous) Dasycladalean Alga Of The Western Tethyan Domain, Felix Schlagintweit
Studia UBB Geologia
The dasycladalean alga Chinianella? scheympflugi was described by Hofmann (1994) from the Tithonian of the Ernstbrunn Limestone of Lower Austria. This alga, so far unreported besides its type-locality, is reported from the Late Jurassic of Poland, the Northern Calcareous Alps of Austria, Crimea (Ukraine), and Greece (Parnassos Zone). Facies are well-agitated outer platform habitats (peri-reefal and back-reefal facies). The cylindrical thallus consists of three parts: a sterile Salpingoporella-like basal part (stalk), a fertile Chinianella-type main portion and a short sterile top part. The transition from the stalk to the main thallus portion is well marked and abrupt. The stratigraphic range …
New Observations On Permocalculus Gosaviensis Schlagintweit, 1991 (Calcareous Alga) From The Upper Cretaceous Of The Northern Calcareous Alps (Gosau Group, Austria), Felix Schlagintweit
New Observations On Permocalculus Gosaviensis Schlagintweit, 1991 (Calcareous Alga) From The Upper Cretaceous Of The Northern Calcareous Alps (Gosau Group, Austria), Felix Schlagintweit
Studia UBB Geologia
New thin-sections from the Upper Cretaceous Gosau Group of Brandenberg, Tyrol, Austria, yielded well-preserved specimens of the calcareous alga Permocalculus gosaviensis Schlagintweit. Microfacies are foraminiferal-algal wackestones; stratigraphy is Upper Turonian (?Lower Coniacian). It is shown that the original description was based on oblique sections leading to the incorrect assumption of a piriform segment morphology. Instead, P. gosaviensis is a representative of Permocalculus of the group with constrictions/swellings along the segments (waxing-and-waning type). Permocalculus nikolapantici Radoičić from the Upper Turonian of Serbia is considered a junior synonym of Permocalculus gosaviensis Schlagintweit.
Polito- A New Open-Source, Platform Independent Software For Generating High-Quality Lithostratigraphic Columns, Ciprian C. Stremtan, Alexandru Tudor
Polito- A New Open-Source, Platform Independent Software For Generating High-Quality Lithostratigraphic Columns, Ciprian C. Stremtan, Alexandru Tudor
Studia UBB Geologia
POLITO is a free, open-source, and platform-independent software which can automatically generate lithostratigraphic columns from field data. Its simple and easy to use interface allows users to manipulate large datasets and create high-quality graphical outputs, either in editable vector or raster format, or as PDF files. POLITO uses USGS standard lithology patterns and can be downloaded from its Sourceforge project page (http://sourceforge.net/projects/polito/).
Mineralogy Of Speleothems From Four Caves In The Purcăreţ - Boiu Mare Plateau And The Baia Mare Depression (Nw Romania), Tudor Tamas, Razvan Ungureanu
Mineralogy Of Speleothems From Four Caves In The Purcăreţ - Boiu Mare Plateau And The Baia Mare Depression (Nw Romania), Tudor Tamas, Razvan Ungureanu
Studia UBB Geologia
The Purcăreţ - Boiu Mare Plateau and the southern edge of the Baia Mare Depression, in Sălaj and Maramureş Counties, NW Romania, host over 200 caves located in limestones ranging in age from Upper Eocene to Badenian. The carbonate rocks are interposed with non-karst rocks consisting of shales, sandstones and marls. Four caves hosted by limestones of different lithologies have been investigated for secondary minerals in the composition of their speleothems. Calcite, gypsum, goethite, jarosite, brushite, hydroxylapatite and taranakite were found in the composition of crusts, crystals, aggregates and earthy masses. The mineral association was characterized by means of X-ray …
Past Surface Conditions And Speleogenesis As Inferred From Cave Sediments In The Great Cave Of Șălitrari Mountain (Sw Romania), Cristina M. Pușcaș, Ciprian C. Stremtan, Ferenc Kristály
Past Surface Conditions And Speleogenesis As Inferred From Cave Sediments In The Great Cave Of Șălitrari Mountain (Sw Romania), Cristina M. Pușcaș, Ciprian C. Stremtan, Ferenc Kristály
Studia UBB Geologia
Abstract In one of the passages in the Great Cave of Șălitrari Mountain the floor is completely covered by an alluvial deposit at least 6 m in thickness, ranging from boulders, and cobbles, to sand and clay, topped by a layer of dry bat guano. Sediment and mineral samples collected from six profiles underwent broad analyses to determine their petrological and mineralogical makeup, grain-size distribution, and paleoclimatic significance. The complicated facies alternation suggests frequent changes in the former stream’s hydrological parameters, with frequent flooding, leading to the hypothesis that the climate was somewhat wetter than today. Both the mineralogical composition …
New Data On Facies Development And Micropaleontology Of The Eastern Margin Of The Getic Carbonate Platform (South Carpathians, Romania): Case Study Of Mateiaş Limestone, Ioan I. Bucur, Daniela Beles, Emanoil Sasaran, Constantin Balica
New Data On Facies Development And Micropaleontology Of The Eastern Margin Of The Getic Carbonate Platform (South Carpathians, Romania): Case Study Of Mateiaş Limestone, Ioan I. Bucur, Daniela Beles, Emanoil Sasaran, Constantin Balica
Studia UBB Geologia
Mateiaş Limestone represents a lithostratigraphic unit included in the Braşov Series, which is a component of the eastern end of the Getic Nappes’ cover (the Getic carbonate platform). The study of the Mateiaş Limestone in Hulei-Mateiaş-Măgura area has evidenced three main facies, and five microfacies types. The Kimmeridgian (possibly also Early Tithonian) age of the Mateiaş Limestone has been assigned based on a microfossil association identified in thin sections. The regional framework, as well as their sedimentological and micropaleontological features point to the deposition of these limestones on shelf margin and slope environments; the succession in the studied area corresponds …
Late Jurassic–Early Cretaceous Foraminifera From Štramberk-Type Limestones, Polish Outer Carpathians, Daria Ivanova, Boguslaw Kolodziej
Late Jurassic–Early Cretaceous Foraminifera From Štramberk-Type Limestones, Polish Outer Carpathians, Daria Ivanova, Boguslaw Kolodziej
Studia UBB Geologia
Foraminifera studies were carried out on the Štramberk-type limestones which occur as pebbles to small boulders (exotics) within the uppermost Jurassic–Palaeogene flysch deposits of the Polish Outer Carpathians. The studies were focused on foraminifera from (1) reef and peri-reef facies, and (2) lagoonal algal-foraminiferal facies. The paper deals with 34 species (including 8 in open nomenclature) representing 30 genera, 22 families, 14 superfamilies, 11 suborders, and 7 orders. A more precise age determination has been obtained for 30 exotics, representing a Tithonian (mostly) to Valanginian age. Foraminiferal assemblages from at least two exotics suggest a Valanginian age as indicated by …
Forest Conservation In A Changing World: Natural Or Cultural? Example From The Western Carpathians Forests, Romania, Angelica N. Feurdean
Forest Conservation In A Changing World: Natural Or Cultural? Example From The Western Carpathians Forests, Romania, Angelica N. Feurdean
Studia UBB Geologia
In order to plan for the future management of some of the most biodiverse forests of Europe, it is essential that we understand under which condition they arose and the time and processes responsible for their variability. Here, I highlight the main findings from the palaeoecological (pollen and charcoal), archaeological and historical investigation comprising the last 6000 years, in the Apuseni Natural Park, NW Romania and discuss the effect of the past land use and forest management on these forests. I then ask what does it mean in term of conservation values if these forests are not natural but a …
Coastal Karren Features In Temperate Microtidal Settings: Spatial Organization And Temporal Evolution, Lluís Gómez-Pujol, Joan J. Fornós
Coastal Karren Features In Temperate Microtidal Settings: Spatial Organization And Temporal Evolution, Lluís Gómez-Pujol, Joan J. Fornós
Studia UBB Geologia
Basin pools are the diagnostic feature of Coastal Karren landscape at temperate settings. According to the size and connectivity parameters four morphological zones are identified along limestone coastal profiles. Each zone reflects the balance between the effects of physical and chemical weathering-erosion agents. Broadly, marine abrasion, bioerosion and biological driven solution show a larger influence seaward, whereas non-biological driven solution enhances its participation landward
Upper Cenomanian – Lower Turonian (Cretaceous) Calcareous Algae From The Eastern Desert Of Egypt: Taxonomy And Significance, Ioan I. Bucur, Emad Nagm, Markus Wilmsen
Upper Cenomanian – Lower Turonian (Cretaceous) Calcareous Algae From The Eastern Desert Of Egypt: Taxonomy And Significance, Ioan I. Bucur, Emad Nagm, Markus Wilmsen
Studia UBB Geologia
An assemblage of calcareous algae (dasycladaleans and halimedaceans) is described from the Upper Cenomanian to Lower Turonian of the Galala and Maghra el Hadida formations (Wadi Araba, northern Eastern Desert, Egypt). The following taxa have been identified: Dissocladella sp., Neomeris mokragorensis RADOIČIĆ & SCHLAGINTWEIT 2007, Salpingoporella milovanovici RADOIČIĆ 1978, Trinocladus divnae RADOIČIĆ 2006, Trinocladus cf. radoicicae ELLIOTT 1968, and Halimeda cf. elliotti CONARD & RIOULT, 1977. Most of the species are recorded from the first time from Egypt. Three of the identified algae (T. divnae, S. milovanovici and H. elliotti) also occur in Cenomanian limestones of the Mirdita zone, Serbia, …
Investigations On Some Zeolitic Volcanic Tuffs From Cluj County (Romania), Used For Zinc Ions Removal From Aqueous Solution, Horea Bedelean, Andrada Maicaneanu, Silvia Burca, Maria Stanca
Investigations On Some Zeolitic Volcanic Tuffs From Cluj County (Romania), Used For Zinc Ions Removal From Aqueous Solution, Horea Bedelean, Andrada Maicaneanu, Silvia Burca, Maria Stanca
Studia UBB Geologia
Representative samples of zeolitic tuffs from Măcicaş, Aluniş and Apahida occurrences (Cluj County, Romania) were investigated using optical microscopy, scanning electron microscopy (SEM), X-ray diffraction (XRD) and wet chemical analyses. The studied tuffs samples are mainly represented by vitric and vitric crystal varieties. The mineral assemblage suggests a rhyo-dacitic petrographic type of the volcanic tuff. Diagenetic alteration process in the pyroclastic sequence from this region led to the formation of zeolites, mainly clinoptilolite. The zeolitic tuffs under study can be used in wastewaters treatment to remove Zn2+ ions. Zn2+ removal was performed on some bulk samples: Aluniş (labelled A1), Apahida …
Managing The Geodiversity In Baia Mare Region: From The Scientific To The Public Interest, Alexandrina Fülöp, Marinel Kovacs
Managing The Geodiversity In Baia Mare Region: From The Scientific To The Public Interest, Alexandrina Fülöp, Marinel Kovacs
Studia UBB Geologia
The management of the geodiversity develops around the geological sites with scientific significance, which may be used for education. It is a key component of the natural resources in the Baia Mare region, which encompasses the Oaş and Gutâi Mts. and the adiacent Oaş, Maramureş and Baia Mare basins. After the decline of the mining-derived activities in the region, the development of the scientific and public interest on the geodiversity can be an alternative for the future. The scientific value of the geodiversity in the Baia Mare region is justified by the complex geology of the Neogene magmatic rocks and …