Results 91 to 100 of about 11,274 (202)

Coherent South American Monsoon Variability During the Last Millennium Revealed Through High‐Resolution Proxy Records

open access: yesGeophysical Research Letters, 2019
The number of paleoprecipitation records from the South American Monsoon domain that cover the last millennium has increased substantially in past years.
J. L. P. S. Campos   +6 more
doaj   +1 more source

Geochemical constraints on the origin of enigmatic cemented chalks, Norfolk, UK [PDF]

open access: yes, 2009
Very hard cemented chalk stacks and crusts found locally in the upper part of the Cretaceous Chalk of north Norfolk, UK, are related to solution features.
A. MARCA-BELL   +13 more
core   +1 more source

Subterranean glacial spillways: an example from the karst of South Wales, UK [PDF]

open access: yes, 2013
Many karst areas in the UK have been glaciated one or more times during the last 0.5 Ma, yet there are few documented examples of caves in these regions being affected by glacial processes other than erosion.
Farrant, Andrew R.   +2 more
core  

Uranium-series dating of gypsum speleothems: methodology and examples. [PDF]

open access: yesInternational Journal of Speleology, 2010
The analytical problems of dating gypsum speleothems with the U-series technique are reviewed. Gypsum speleothems are, in general, very low in U content, challenging the limits of detection methods.
Sanna Laura   +6 more
doaj  

SISAL: Bringing Added Value to Speleothem Research

open access: yesQuaternary, 2019
Isotopic records from speleothems are an important source of information about past climates and, given the increase in the number of isotope-enabled climate models, are likely to become an important tool for climate model evaluation.
Laia Comas-Bru, Sandy P. Harrison
doaj   +1 more source

Microbial Diversity and Mineralogical-Mechanical Properties of Calcitic Cave Speleothems in Natural and in Vitro Biomineralization Conditions

open access: yesFrontiers in Microbiology, 2018
Natural mineral formations are a window into important processes leading to carbon storage and mineralized carbonate structures formed through abiotic and biotic processes. In the current study, we made an attempt to undertake a comprehensive approach to
Navdeep K. Dhami   +2 more
doaj   +1 more source

Organic matter of fossil origin in the amberine speleothems from El Soplao Cave (Cantabria, Northern Spain)

open access: yesInternational Journal of Speleology, 2012
Unusual amberine-coloured speleothems were recently found in El Soplao Cave (Cantabria, Spain). Chromophore elements such as Fe, Mn, Cd, Co or Ti were not present in significant quantities.
Gázquez Fernando   +4 more
doaj  

Diagenesis of a drapery speleothem from Castañar Cave: from dissolution to dolomitization

open access: yesInternational Journal of Speleology, 2012
A drapery speleothem (DRA-1) from Castañar Cave in Spain was subjected to a detailed petrographical study in order to identify its primary and diagenetic features.
Martín-Pérez A.   +2 more
doaj  

Recent, slow and aseismic movement of an overthrust observed in the Abel sink hole (St Vallier de Thiey, 06, France) [PDF]

open access: yes, 1999
International audienceThe main galeries of the Abel sinkhole near Grasse (Alpes Maritimes - France) are developped along a main thrust fault. The study of speleothems proves clearly a recent movement of this fault.
Gilli, Eric
core   +2 more sources

Speleothem microstructure/speleothem ontogeny: a review of Western contributions

open access: yesInternational Journal of Speleology, 2012
Mineral ontogeny is the study of the growth and development of mineral deposits in general and, in the present context, speleothems in particular. Previous researchers, mainly in Russia, have developed a nomenclatural hierarchy based on the forms and ...
White William B.
doaj  

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