Results 21 to 30 of about 1,252 (175)

Characterizing Stalagmites’ Eigenfrequencies by Combining In Situ Vibration Measurements and Finite Element Modeling Based on 3D Scans

Geosciences, 2020
Broken or deformed speleothems have been used as indicators of paleo-earthquakes since the 1990s; however, a causal link is difficult to prove except for some thin speleothems.
Aurélie Martin, Thomas Lecocq, Klaus-G. Hinzen, Thierry Camelbeeck, Yves Quinif, Nathalie Fagel   +5 more
doaj   +1 more source

Late Quaternary Climate Variability and Change from Aotearoa New Zealand Speleothems: Progress in Age Modelling, Oxygen Isotope Master Record Construction and Proxy-Model Comparisons

Quaternary, 2020
We re-evaluated speleothem isotope series from Aotearoa New Zealand that were recently contributed to the Speleothem Isotopes Synthesis and AnaLysis (SISAL) database.
Andrew M. Lorrey, Paul W. Williams, John-Mark Woolley, Nicolas C. Fauchereau, Adam Hartland, Helen Bostock, Shaun Eaves, Matthew S. Lachniet, James A. Renwick, Vidya Varma   +9 more
doaj   +1 more source

Quantification of lignin oxidation products as vegetation biomarkers in speleothems and cave drip water [PDF]

Biogeosciences, 2018
Here we present a sensitive method to analyze lignin oxidation products (LOPs) in speleothems and cave drip water to provide a new tool for paleo-vegetation reconstruction. Speleothems are valuable climate archives.
I. Heidke, D. Scholz, T. Hoffmann
doaj   +1 more source

Speleothems in sandstone crevice and boulder caves of the Elbe River Canyon, Czech Republic

International Journal of Speleology, 2022
A variety of speleothems are present in crevice and boulder caves developed in Cretaceous sandstones of the Elbe River Canyon in northern Czech Republic.
Jiří Adamovič, Jaroslav Kukla, Michal Filippi, Roman Skála, Noemi Mészárosová   +4 more
doaj   +1 more source

España Speleothems in karstic caves beneath paleoglaciers in the Central Pyrenees

Geogaceta
We explore the potential of various caves and karst systems of the Central Pyrenees (Lecherines-Collarada-Monte Perdido-Escuaín-Vignemale-Cotiella-Aneto-Maladeta) that could host speleothems that grew in karstic caves under glaciated areas.
Miguel Bartolomé Úcar, Ánchel Belmonte-Ribas, Reyes Giménez, Mario Bielsa, Gerard Cazenave, Ana Moreno   +5 more
doaj   +1 more source

Trace elements in speleothems. A short review of the state of the art. [PDF]

International Journal of Speleology, 2004
A state of the art of the research on trace elements of speleothems is given. First studies focussed on problems such as the colour of speleothems and the aragonite problem.
Verheyden Sophie
doaj  

Looking for Microbial Biosignatures in All the Right Places: Clues for Identifying Extraterrestrial Life in Lava Tubes

Applied Sciences
Lava caves are home to a stunning display of secondary mineral speleothems, such as moonmilk and coralloids, as well as highly visible microbial mats. These features contain diverse and under-characterized groups of bacteria.
Joseph J. Medley, Jennifer J. M. Hathaway, Michael N. Spilde, Diana E. Northup   +3 more
doaj   +1 more source

Speleothems in quartz-sandstone caves of Ponta Grossa municipality, Campos Gerais region, Paraná state, southern Brazil

International Journal of Speleology, 2020
The present communication characterizes and discusses the genesis of cave speleothems developed in Furnas Formation (Silurian-Devonian) and Vila Velha sub-unit (Campo Mourão Formation, Upper Carboniferous) quartz-sandstones, in southern Brazil.
Henrique S. Pontes, Luiz A. Fernandes, Mário S. de Melo, Gilson B. Guimarães, Laís L. Massuqueto   +4 more
doaj   +1 more source

Geochronological reconstruction of the Lateglacial deglaciation in the Arve Valley (Northern French Alps)

Journal of Quaternary Science, EarlyView.
ABSTRACT The timing and spatial patterns of glaciers retreat in the Northern French Alps during the Lateglacial (19.0–11.7 ka) remain debated, reflecting discrepancies among available chronological data sets. The complex interactions between major glaciers, such as the Rhône and Arve glaciers to the north and the Isère glacier to the south, represent a
Quentin Portal, Christian Crouzet, Jean‐François Buoncristiani, Julien Carcaillet   +3 more
wiley   +1 more source

A reappraisal of the Middle to Later Stone Age prehistory of Morocco Réévaluer la préhistoire du Maroc, du Middle Stone Age au Later Stone Age

Journal of the Royal Anthropological Institute, EarlyView.
Over the last 25 years, perceptions of the early prehistory of Northwest Africa have undergone radical changes due to new fieldwork projects and a corresponding growth in scientific interest in the region. Much of this work has been focused in Morocco, known for its extremely rich fossil and archaeological records in caves and rock shelters.
Nick Barton, Abdeljalil Bouzouggar, Stacy Carolin, Louise Humphrey   +3 more
wiley   +1 more source