Results 121 to 130 of about 861 (183)
Quaternary tufas of the western Potiguar Basin, Brazil: rapid xeromorphic adaptation and climate change inferred from sedimentology, paleobotany, and fossil diagenesis. [PDF]
NaturwissenschaftenAureliano T +12 more
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Geomicrobiology Journal, 1997
The travertines at Pamukkale contain a diverse assemblage of phototrophs: 17 species of cyanobacteria, 16 diatoms, and 5 Chlorophyceae. Two communities were recognized on the active travertines: (1) surficial mats dominated by filamentous cyanobacteria, particularly Lyngbya (Phormidium) laminosum forming soft weakly mineralized layers to 10 mm thick ...
Allan Pentecost
exaly +2 more sources
The travertines at Pamukkale contain a diverse assemblage of phototrophs: 17 species of cyanobacteria, 16 diatoms, and 5 Chlorophyceae. Two communities were recognized on the active travertines: (1) surficial mats dominated by filamentous cyanobacteria, particularly Lyngbya (Phormidium) laminosum forming soft weakly mineralized layers to 10 mm thick ...
Allan Pentecost
exaly +2 more sources
Geology Today, 2022
Travertine is widespread in karst terrains, and less so elsewhere, and some of its varieties constitute spectacular landforms, many of which become popular visitor sites for geologists and non‐geologists alike. Among the many forms of travertine, barrages are the most spectacular, especially where they still have streams or rivers cascading over them ...
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Travertine is widespread in karst terrains, and less so elsewhere, and some of its varieties constitute spectacular landforms, many of which become popular visitor sites for geologists and non‐geologists alike. Among the many forms of travertine, barrages are the most spectacular, especially where they still have streams or rivers cascading over them ...
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2018
Sediment bodies of travertine exhibit unique geomorphology that results from its rapid sedimentation rate. As described in Chap. 2 and will be discussed in Chap. 6, the rapid sedimentation rate is closely associated with rapid CO2 degassing from water, which elevates the level of supersaturation with respect for CaCO3. Intensity of the CO2 degassing is
Akihiro Kano +3 more
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Sediment bodies of travertine exhibit unique geomorphology that results from its rapid sedimentation rate. As described in Chap. 2 and will be discussed in Chap. 6, the rapid sedimentation rate is closely associated with rapid CO2 degassing from water, which elevates the level of supersaturation with respect for CaCO3. Intensity of the CO2 degassing is
Akihiro Kano +3 more
openaire +1 more source
2018
In this chapter, we describe several representative travertine sites in the Japanese islands. According to our extensive search, there are at least 30 hot springs that developed calcareous deposits (Fig. 7.1, see also Figs. 7.13 and 7.15). Many of them are simple localities having only a single onsen facility, and an example is Furofushi hot spring on ...
Akihiro Kano +3 more
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In this chapter, we describe several representative travertine sites in the Japanese islands. According to our extensive search, there are at least 30 hot springs that developed calcareous deposits (Fig. 7.1, see also Figs. 7.13 and 7.15). Many of them are simple localities having only a single onsen facility, and an example is Furofushi hot spring on ...
Akihiro Kano +3 more
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Classification of travertine plates with image processing
2015 23nd Signal Processing and Communications Applications Conference (SIU), 2015In our country, natural stone production process is last step which is classification carried out by selection workers. This is the most important stages of the production process, and has been affected from worker faults. By this way, the quality standard of products could be destroyed.
Cetisli, Bayram +2 more
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Retention of boron by travertines
Chemical Geology, 1972Abstract The boron content of travertines can be related to the boron concentration in the travertine-depositing thermal waters in terms of the Freundlich adsorption isotherm. Boron is considered to be taken up by travertines through adsorption. Chemical analyses of travertines are presented.
M. Ichikuni, Kazuo Kikuchi
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The dynamics of travertine dams
Earth and Planetary Science Letters, 2007We 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 ...
O HAMMER, D DYSTHE, B JAMTVEIT
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A multifrequency EPR approach to travertine characterisation
Journal of Magnetic Resonance, 2005The understanding of processes that give rise to travertine deposits is important. This is so because of its widespread use as decorative material, but more so in environmental studies due to the significance, by proxy, of travertine in climatology. In this paper, a multifrequency EPR spectroscopy study of the behaviour of an ubiquitary vicariant of Ca
Di Benedetto F +5 more
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Facies, 1993
In Southern Germany, two examples of travertines of different age and depositional morphology were examined in detail. Travertines are laminated carbonate rocks formed by precipitation from mineral and/or thermal waters. They include characteristic facies types, such as bushy layers (‘shrubs’) referred to calcification of branching microbes ...
Christoph G. Koban, Günter Schweigert
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In Southern Germany, two examples of travertines of different age and depositional morphology were examined in detail. Travertines are laminated carbonate rocks formed by precipitation from mineral and/or thermal waters. They include characteristic facies types, such as bushy layers (‘shrubs’) referred to calcification of branching microbes ...
Christoph G. Koban, Günter Schweigert
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