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Sub-Recent Microfauna Within Allogenic Sediments At The Bottom Of A Deep Cave, Njemica (Biokovo Mt., Croatia), Tomislav Kurečić, Valentina Hajek Tadesse, Lara Wacha, Marija Horvat, Nina Trinajstić, Ivan Mišur

International Journal of Speleology

Clastic sediments deposited at the bottom of the vertical, nearly 1000 m deep Njemica Cave (Biokovo Mountain, Croatia) were analysed. Owing to the vertical morphology of the cave, the occurrences of clastic sediments are sparse. Small, up to decimetre-thick, undisturbed sediment accumulations situated near the siphon lake revealed interesting palaeontological and mineralogical data. These data are used as a useful proxy for discussing depositional processes, the provenance of the sediments and paleo-habitats of the subterranean fauna.

The sub-recent assemblages of ostracods were discovered within the sediment, and they were shown to be correlative to the known endemic species in the …

Past Ice-Ocean Interactions On The Sabrina Coast Shelf, East Antarctica: Deglacial To Recent Paleoenvironmental Insights From Marine Sediments, Kara J. Vadman

USF Tampa Graduate Theses and Dissertations

The East Antarctic Ice Sheet (EAIS) contains ~53 meters of sea level equivalent (SLE) ice, and observations suggest it is sensitive to ongoing and past climate change. The EAIS has traditionally been considered insensitive to climate perturbations because it is largely grounded above sea level. However, aerogeophysical surveys, oceanographic observations, and models indicate that large areas of the EAIS are grounded below sea level and contain 19.2 m SLE. Marine-based parts of the EAIS are thought to be located on inland-sloping beds that drain through marine terminating outlet glaciers, indicating large areas of the EAIS may be more sensitive to …

Application Of Modern Foraminiferal Assemblages To Paleoenvironmental Reconstruction: Case Studies From Coastal And Shelf Environments, Christian Haller

USF Tampa Graduate Theses and Dissertations

The aim of paleoenvironmental studies is to reconstruct characteristics of the past environment from fossil assemblages preserved in sedimentary strata. Thus, studies of modern surface assemblages, quantitatively correlated to the environmental parameters, are required before reliable interpretations can be made. For this dissertation, two different techniques were applied in two case studies: a reconstruction making use of a benthic foraminiferal transfer function from the intertidal marshes in the eastern Mississippi Sound, Alabama/Mississippi, and a qualitative reconstruction of ocean current activity on the Western Australian shelf.

Modern salt-marsh foraminifera were collected from Grand Bay, Pascagoula, Fowl River, and Dauphin Island across …

New Approach On The Saiga Antelopes (Saiga Tatarica/Borealis; Bovidae) From The Late Pleistocene And Holocene Of Crimea (Se Ukraine), Matei M. Vremir

Studia UBB Geologia

The present paper is a short review of the knowledge regarding the fossil saiga antelopes from the Pleistocene and Holocene of Crimea, in the context of the general taxonomic and phylogenetic problems in question. According to the newly discovered paleontological material from the Crimean Mountain cave-sites, a new point of view is considered.

Nouvelles Contributions A La Connaisance De L'Histoire De La Vegetation Holocene Des Monts Rodnei (Carpates Orientales), Ioan TanțăU

Studia UBB Geologia

New Contributions to the Knowledge of the Holocene Vegetation History of Rodnei Mountains. Two sequences originating from one peat bog in Poiana Ştiol (Rodnei Mts.) were pollen analyzed. The vegetation history is described since the Atlantic period. In this period the vegetation is dominated by Picea together with Corylus, Ulmus and Alnus viridis. The components frequencies of the Quercetum mixtum (Quercus, Fraxinus, Tilia, Corylus) rarely exceed 10%. The vegetation of the Subboreal period is dominated by the Carpinus and that of the Subatlantic is dominated by Fagus. Picea pollen is well represented belong the entire sequences.

Aspects De L'Histoire De La Végétation Tardiglaciaire Et Holocène Dans La Région Des Subcarpates De La Courbure (Subcarpates De Buzau), Ioan TanțăU, Maurice Reille, Sorina FăRcaș, Jacques-Louis De Beaulieu

Studia UBB Geologia

A Late Glacial - Holocene sequence from the Bisoca peat bog (Buzăului Subcarpathians) was studied from palynological point of view. The vegetation history, supported by 12 14C dates is described since the end of the Late Glacial. At the onset of the Holocene Ulmus became established by around 9,700 B.P.; Quercus, Fraxinus, Tilia, Corylus became established almost simultaneously by around 9,500 B.P. The local establishment of Carpinus is about 6,200 B.P. Its maximum occurred since 5,000 B.P. Fagus pollen is regularly recorded since 7,000 B.P. Its absolute dominance took place at about 2,000 B.P.

A Large Cervidae Holocene Accumulation In Eastern Brazil: An Example Of Extreme Taphonomical Control In A Cave Environment, Alex Hubbe, Augusto S. Auler

International Journal of Speleology

A remarkable cervid bone accumulation occurs at a single passage (named Cervid Passage; CP) at Lapa Nova, a maze cave in eastern Brazil. CP lies away from cave entrances, is a typical pitfall passage and contains bone remains of at least 121 cervids, besides few bats, peccaries and rodents remains. There is no evidence of water (or sediment) flow at the site and in general bones lack post depositional alterations and display anatomical proximity, suggesting that the majority of the remains found inside CP (mainly cervids) are due to animals that after entering the cave got trapped in the site. …

Comparison Of 14c And U-Th Ages Of Two Holocene Phreatic Overgrowths On Speleothems From Mallorca (Western Mediterranean): Environmental Implications, Paola Tuccimei, Mark Van Strydonck, Angel Ginés, Joaquín Ginés, Michele Soligo, Igor M. Villa, Joan J. Fornós

International Journal of Speleology

This investigation reports on the comparison between ICP-MS U-Th and AMS 14C ages of Phreatic Overgrowths on Speleothems (POS) from two different caves on the island of Mallorca (Spain). These speleothem encrustations form at the water table of coastal caves in a low-amplitude tide-controlled microenvironment and are used to reconstruct past sea level changes. The aim of this study is to evaluate if this particular type of speleothem is datable using 14C method and to investigate possible problems connected with the incorporation of dead carbon inherited from the dissolution of 14C-free limestone. The results show that 14C ages are strongly …

Palaeoclimatic Significance Of Perennial Ice Accumulations In Caves: An Example From Scarisoara Ice Cave, Romania, Aurel Persoiu Tiritu

USF Tampa Graduate Theses and Dissertations

Stable isotopes in ice cores drilled in the polar and high-mountain region have been used intensively to reconstruct past climatic changes and atmospheric dynamics. However, no similar studies have been conducted on perennial ice accumulations in caves due to a limited understanding of the links between the external and cave environments, and the way in which the climatic signal can be recorded by the cave ice.

In this thesis, we successfully designed and build a research methodology for the reconstruction of past climatic changes based on perennial ice accumulation in caves, using as example the Scarisoara Ice Cave, Romania. The …