نتایج جستجو برای: travertine

تعداد نتایج: 197  

A. Jamshidi A. Zalooli H. Yeganehfar M. Khamehchiyan M.R. Nikudel

     Salt crystallization is one of the most powerful weathering agents that may cause a rapid change in the mechanical properties of stones, and thus limit their durability. Consequently, determining the mechanical properties of stones due to salt crystallization is important for natural building stones used in marine environmental and mild climatic conditions, which expose excessive salt crys...

Journal: :Geological Quarterly 2022

The Başkale Basin is located in the easternmost part of Türkiye, within a tectonically active area, and at intersection Europe, Asia Middle East. In this study, Dereiçi travertines, one most important products neotectonism basin, were investigated sedimentologically, mineralogically geochemically. To understand neotectonic evolution travertine succession, sequence was studied from bottom to top...

Journal: :Journal of human evolution 2014
Dongfang Xiao Christopher J Bae Guanjun Shen Eric Delson Jennie J H Jin Nicole M Webb Licheng Qiu

We present an analysis of a set of previously unreported hominin fossils from Maba (Guangdong, China), a cave site that is best known for the presence of a partial hominin cranium currently assigned as mid-Pleistocene Homo and that has been traditionally dated to around the Middle-Late Pleistocene transition. A more recent set of Uranium series dates indicate that the Maba travertine may date t...

2016
Federica Fava Massimo Ponti Marco Abbiati

Coralligenous biogenic reefs are among the most diverse marine habitats in the Mediterranean Sea. The northern Adriatic mesophotic coralligenous outcrops host very rich and diverse epibenthic assemblages. Several studies quantified the low temporal variability and high spatial heterogeneity of these habitats, while processes driving structuring and differentiation are still poorly understood. T...

Journal: :Minerals 2023

Travertine spring mounds are common in Slovakia; however, their age and depositional temperature still poorly known. Our study is the first multimethodological investigation involving stable carbon, oxygen, clumped isotope (Δ47) analyses U-Th determination of travertine from different locations Slovakia (Santovka, Dudince, Čerin, Bešeňová, Liptovský Ján, Liptovské Sliače, Vyšné Ružbachy, Gánovc...

Journal: :Occupational and environmental medicine 1994
M Bovenzi A Franzinelli L Scattoni L Vannuccini

In a six year follow up study of the handarm vibration syndrome, 62 stoneworkers operating hand held vibrating tools in 10 travertine quarries and mills were first investigated in 1985 and then in 1991. The frequency weighted acceleration of vibration from the rock drills and stone hammers used by the travertine workers exceeded 20 m/s2, indicating a hazardous work activity according to the pro...

Journal: :Minerals 2023

A stratigraphy of a buried travertine deposit was developed using stable isotope geochemistry, trace elements, and radiometric dating. The identified in well at Prima Porta (north Rome, Italy), located the western boundary Tiber Valley, morpho-tectonic depression extensional origin. It deposited close to spring that discharged groundwaters from nearby volcanic aquifer associated with rise deep-...

Journal: :Minerals 2023

The south-eastern Gorny Altai is one of the most hazardous seismogenic area in north Central Asia. We present a synthesis field, 230Th-U geochronological, mineralogical and geochemical data collected on seven Quaternary travertines. All travertines occur within zones active faults that border Chuya Kurai intermontane basins. Travertine cement mainly comprises calcite (with minor amounts aragoni...

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