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Wyszukujesz frazę "tufa" wg kryterium: Temat


Wyświetlanie 1-4 z 4
Tytuł:
Waterfalls: forms, distribution, processes and rates of recession
Autorzy:
Goudie, Andrew S.
Powiązania:
https://bibliotekanauki.pl/articles/1050846.pdf
Data publikacji:
2020-03-31
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
waterfalls
caprock
knickpoints
plunge pools
tufa
Opis:
A waterfall is a very steep (commonly nearly vertical) fall of some magnitude in a river course. Waterfalls are widespread fluvial landforms that have been described from many parts of the world. Thirty-eight World Heritage Properties include waterfalls in their designation. In addition, some waterfalls are actual or potential geomorphosites. Waterfalls occur in almost all climatic environments, though they are particularly common in formerly glaciated areas. They occur on a huge diversity of rock types, although in general, they do not form persistent or large falls on soft or unconsolidated rocks. Waterfalls also occur in a wide range of geomorphological settings: glaciated areas, areas of active tectonism, areas of sea-cliff retreat and sea-level change, great escarpments on passive margins, basins with river capture, rifted and faulted areas and areas that have been subjected to megaflooding. Multiple processes account for waterfall retreat and varying rates of recession. Although the greatest interest has been in rates of waterfall recession, there are examples of waterfalls that prograde as a result of tufa deposition.
Źródło:
Quaestiones Geographicae; 2020, 39, 1; 59-77
0137-477X
2081-6383
Pojawia się w:
Quaestiones Geographicae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
U-Th ages and facies properties of Edremit travertines and tufas, Van, Eastern Anatolia : implications for the neotectonics of the region
Autorzy:
Yeşilova, Çetin
Güngör Yeşilova, Pelin
Açlan, Mustafa
Yu, Tsai-Luen
Shen, Chuan-Chou
Powiązania:
https://bibliotekanauki.pl/articles/2059601.pdf
Data publikacji:
2021
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
palaeosol
travertine facieses
Van Fault
tufa
growth rate
Lake Van
Opis:
Travertine formation is one of the most important archives of active tectonics in a region and provides information about climate, water temperature and quantity, and biological activity. The Edremit travertines and tufas extend over nearly160 km2 within the boundaries of the Edremit area to the east of Lake Van (eastern Turkey), and yield important evidence towards understanding the neotectonics of the region. The Edremit travertines and tufas were studied throughout their full stratigraphic extent, the factors controlling the formation of these deposits were examined, and the succession was sampled for U/Th analysis. Travertine formation was found to occur from 542–29.7 ka, with two different tufa formation periods: from 29.7–5.8 ka and 5.8–2.08 ka. Pauses in travertine formation (palaeosols) were identified from 510–470 ka, 289–269 ka and 91–34 ka. Our study showed that climate parameters affected the formation of tufa, while the Edremit travertines developed under the control of tectonism. The Van Fault is directly associated with travertine development and its age was identified as 542 ka or older. Since the Gürpιnar Fault, one of the most important faults in the region, is effective in shaping the southern slope of the travertines and limiting the movement of the Van Fault, its age should be younger than 542.4 ka. The Elmalιk Fault played an active role in the formation of the Edremit tufas and is proposed to be 29.7 ka in age, from stratigraphic relationships in the region.
Źródło:
Geological Quarterly; 2021, 65, 2; 65: 28
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Late glacial and Early Holocene fauna of the tufa in Gron at Podhale
Autorzy:
Alexandrowicz, W.P.
Powiązania:
https://bibliotekanauki.pl/articles/83736.pdf
Data publikacji:
2012
Wydawca:
Uniwersytet Mikołaja Kopernika. Wydział Biologii i Ochrony Środowiska. Stowarzyszenie Malakologów Polskich
Tematy:
Late Glacial
Early Holocene
fauna
tufa
Gron village
Podhale region
carbonate deposit
Lesnica Stream
mollusc
Źródło:
Folia Malacologica; 2012, 20, 1
1506-7629
Pojawia się w:
Folia Malacologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Shell thanatocenoses in the Raclawka valley near Cracow
Autorzy:
Alexandrowicz, S.W.
Powiązania:
https://bibliotekanauki.pl/articles/84312.pdf
Data publikacji:
1999
Wydawca:
Uniwersytet Mikołaja Kopernika. Wydział Biologii i Ochrony Środowiska. Stowarzyszenie Malakologów Polskich
Tematy:
shell
thanatocoenosis
tufa
animal species
snail
habitat
Carychium tridentatum
Vitrea crystallina
Aegopinella pura
Discus rotundatus
Columella edentula
Cochlicopa lubrica
Vitrea contracta
Alinda biplicata
Vitrina pellucida
Vallonia costata
Truncatellina costulata
Raclawka valley
Krakow area
Źródło:
Folia Malacologica; 1999, 07, 4
1506-7629
Pojawia się w:
Folia Malacologica
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-4 z 4

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