Results 21 to 30 of about 1,261 (178)

Transition from unclassified Ktedonobacterales to Actinobacteria during amorphous silica precipitation in a quartzite cave environment

Scientific Reports, 2021
The orthoquartzite Imawarì Yeuta cave hosts exceptional silica speleothems and represents a unique model system to study the geomicrobiology associated to silica amorphization processes under aphotic and stable physical–chemical conditions. In this study,
D. Ghezzi, F. Sauro, A. Columbu, C. Carbone, P.-Y. Hong, F. Vergara, J. De Waele, M. Cappelletti   +7 more
doaj   +1 more source

Low impact sampling of speleothems – reconciling scientific study with cave conservation

International Journal of Speleology, 2021
Speleothems are increasingly valued as important paleoclimate archives and yet the removal of samples from caves can come at a cost to natural heritage, impacting delicate environments with limited mechanisms for repair. Conservation of cave environments
Claire MacGregor, John Hellstrom, Jon Woodhead, Russell Drysdale, Rolan Eberhard   +4 more
doaj   +1 more source

Challenges in the Direct Determination of 17Oexcess in Microliter Amount of Water Extracted From Speleothem Fluid Inclusions

Frontiers in Earth Science, 2021
Water isotopes are powerful proxies able to deliver valuable information about past climate conditions at the precipitation site, along the path of the moisture or at its source.
Stéphane Affolter, Stéphane Affolter, Markus C. Leuenberger   +2 more
doaj   +1 more source

Composition and Structure of Phosphate-Rich Parietal Crusts and Nodules in Monte Corchia Cave, Alpi Apuane (Central Italy)

Frontiers in Earth Science, 2021
Cave environment allows long-term processes of rock weathering and chemical deposition that cannot occur on Earth surface directly exposed to meteoric and external biochemical agents.
Leonardo Piccini, Alessia Nannoni, Pilario Costagliola, Mario Paolieri, Chiara Vigiani   +4 more
doaj   +1 more source

Cadre environnemental des premières occupations humaines du Brésil : évolution de la végétation et du climat au cours des derniers 40 000 ans

Brésil(s), 2022
Based on palynological and isotopic records available across Brazil, this article traces the evolution of the landscape since the last glaciation in four different time intervals, namely the MIS3, the Last Glacial Maximum, the Tardiglacial, and the ...
Marie-Pierre Ledru
doaj   +1 more source

Speleothems and Biomineralization Processes in Hot Spring Environment: The Case of Aedipsos (Edipsos), Euboea (Evia) Island, Greece

Journal of Marine Science and Engineering, 2022
Caves with hot springs and speleothem deposits are infrequent environments of high scientific interest due to their unique environmental conditions. The selected site is a small open cave with a hot spring and stalactites in the Aedipsos area (NW Euboea ...
Christos Kanellopoulos, Vasiliki Lamprinou, Artemis Politi, Panagiotis Voudouris, Ioannis Iliopoulos, Maria Kokkaliari, Leonidas Moforis, Athena Economou-Amilli   +7 more
doaj   +1 more source

Cave monitoring and the potential for palaeoclimate reconstruction from Cueva de Asiul, Cantabria (N. Spain)

International Journal of Speleology, 2016
Palaeoclimate records from northern Iberia are becoming increasingly sought after as this region is one of the most southerly terrestrial locations in Europe to have its climate dictated principally by the North Atlantic.
Andrew C. Smith, Peter M. Wynn, Philip A. Barker, Melanie J. Leng, Steve R. Noble, Andrew Stott   +5 more
doaj   +1 more source

Co-authorship analysis of the speleothem proxy-climate community: working together to tackle the big problems

International Journal of Speleology, 2018
Understanding the environmental context of speleothem palaeo-climate proxies is fundamental to their interpretation. We analyse four methodological approaches to accomplish this: stalactite discharge analysis, proxy/process tracer studies, discharge ...
Micheline L. Campbell, John N. Callow, Gavan S. McGrath, Hamish A. McGowan   +3 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

Central European warm phases recorded by episodic speleothem growth during MIS 3

Communications Earth & Environment
Speleothems provide exceptional age control and are a valuable archive for the identification of warm phases in temperate climates. Here we present a speleothem composite record from Germany, which shows episodic growth during the last glacial period ...
Jennifer Klose, Michael Weber, Denis Scholz   +2 more
doaj   +1 more source