Raponzolo is a paleo-phreatic cave explored in 2011 in the Brenta Dolomites (Trentino, Italy), at the remarkable altitude of 2,560 m a.s.l. Differently to all other caves of the area, it hosts well-cemented fi ne to medium sands of granitic-metamorphic composition. The composition suggests a sediment source from the Adamello and Tonale Unit,...
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2021 (v1)PublicationUploaded on: April 14, 2023
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2019 (v1)Publication
Quartz sandstone of the Sarisariñama massif in Venezuela hosts the world biggest collapse dolines in quartz-rich lithologies, with volumes up to some millions of cubic meters. Due to extremely complex logistics required to reach the massif, the genesis of these depressions and of the underlying caves has never been studied in detail. The lack...
Uploaded on: March 27, 2023 -
2020 (v1)Publication
Meghalaya (NW India) is one of the regions in the world with highest recorded rainfalls. Because of these peculiar climatic conditions and intense solutional weathering, karstic caves are widely reported in the numerous lime- stone areas of this part of India. Likewise, the extremely high rainfall and the tropical monsoon climate have...
Uploaded on: April 14, 2023 -
2021 (v1)Publication
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, three consecutive evolution steps in the formation of a peculiar blackish coralloid...
Uploaded on: April 14, 2023 -
2018 (v1)Publication
Chemical mobility of crystalline and amorphous SiO2 plays a fundamental role in several geochemical and biological processes, with silicate minerals being the most abundant components of the Earth's crust. Although the oldest evidences of life on Earth are fossilized in microcrystalline silica deposits, little is known about the functional role...
Uploaded on: March 27, 2023