منابع مشابه
The dynamics of travertine dams
We present a simple, abstract model for travertine dam formation. The simulation uses a depth-averaged hydrodynamic code, coupled with an empirical precipitation model where surface-normal growth rate is proportional to local flow rate. The dynamics of the resulting formation, coarsening and migration (progradation) of crests is demonstrated and compared with field observations. The local self-...
متن کاملThe Treatment of Lead- Contaminated Travertine
In the urban sites the lead addition in petrol, as an antidetonation agent, allows pollution of exposed surfaces of buildings, soils and vegetation. In a preliminary way a research work has been carried out simulating lead pollution of the slab surfaces of the Roman-Travertine stone. The Roman-Travertine is a limestone dimensional stone widely employed in Italy especially for dressing of the ol...
متن کاملReversed Crystal Growth of Calcite in Naturally Occurring Travertine Crust
A microstructural investigation by electron microscopy on a travertine specimen collected from Munigou National Park, Sichuan Province, China revealed evidence of a non-classical reversed crystal growth route previously only discovered in synthetic materials. Examination of the travertine specimen suggests that the presence of organic matter initiates the oriented aggregation of calcite nanocry...
متن کاملHand-arm vibration syndrome among travertine workers: a follow up study.
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...
متن کاملAssessment of radiological hazards of travertine rocks as building materials
Introduction: Although travertine is now widely used as a building material, the effects of its radiological hazards to public health should be a matter of concern. Therefore, this study aimed to determine its radiological parameters with regard to human health. Material and Methods: In this research 10 travertine samples were collected ...
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ژورنال
عنوان ژورنال: Eos, Transactions American Geophysical Union
سال: 2007
ISSN: 0096-3941
DOI: 10.1029/2007eo220010