Results 21 to 30 of about 1,077 (121)

Dubiofossils from a Mars‐analogue subsurface palaeoenvironment: The limits of biogenicity criteria

Geobiology, Volume 19, Issue 5, Page 473-488, September 2021., 2021
Abstract The search for a fossil record of Earth's deep biosphere, partly motivated by potential analogies with subsurface habitats on Mars, has uncovered numerous assemblages of inorganic microfilaments and tubules inside ancient pores and fractures. Although these enigmatic objects are morphologically similar to mineralized microorganisms (and some ...
Sean McMahon, Magnus Ivarsson, David Wacey, Martin Saunders, Veneta Belivanova, David Muirhead, Pamela Knoll, Oliver Steinbock, Daniel A. Frost   +8 more
wiley   +1 more source

Geothermal Fluid Variation Recorded by Banded Ca‐Carbonate Veins in a Fault‐Related, Fissure Ridge‐Type Travertine Depositional System (Iano, southern Tuscany, Italy)

Geofluids, Volume 2021, Issue 1, 2021., 2021
Banded Ca‐carbonate veins in travertine deposits are efficient recorders of the compositional fluctuations of geothermal fluids flowing (or flowed) from deep reservoirs up to the surface, within fault zones. In this view, these veins represent key tools for decoding those factors that influenced the geochemical variations.
Paola Francesca Matera, Gennaro Ventruti, Martina Zucchi, Andrea Brogi, Enrico Capezzuoli, Domenico Liotta, Tsai-Luen Yu, Chuan-Chou Shen, Katharine W. Huntington, László Rinyu, Sándor Kele, Cinzia Federico   +11 more
wiley   +1 more source

The Slab Puzzle of the Alpine‐Mediterranean Region: Insights From a New, High‐Resolution, Shear Wave Velocity Model of the Upper Mantle

Geochemistry, Geophysics, Geosystems, Volume 21, Issue 8, August 2020., 2020
Abstract Mediterranean tectonics since the Lower Cretaceous has been characterized by a multiphase subduction and collision history with temporally and spatially variable, small‐scale plate configurations. A new shear wave velocity model of the Mediterranean upper mantle (MeRE2020), constrained by a very large set of over 200,000 broadband (8–350 s ...
Amr El‐Sharkawy, Thomas Meier, Sergei Lebedev, Jan H. Behrmann, Mona Hamada, Luigia Cristiano, Christian Weidle, Daniel Köhn   +7 more
wiley   +1 more source

Fluid sources and stable isotope signatures in authigenic carbonates from the Northern Apennines, Italy [PDF]

, 2017
Funding was provided by the Italian PRIN 2009 Project (MIUR research grant to R. Capozzi) and by the Royal Society of Edinburgh (grant to D. Oppo). The authors wish to thank Joachim Reitner (Department of Geobiology, Centre for Geosciences, Georg-August ...
Capozzi, Rossella, Oppo, Davide, Viola, Irene   +2 more
core   +1 more source

Redefinition of the Ligurian Units at the Alps–Apennines junction (NW Italy) and their role in the evolution of the Ligurian accretionary wedge: constraints from mélanges and broken formations [PDF]

, 2019
We document that the undifferentiated chaotic Ligurian Units of the Monferrato–Torino Hill sector (MO-TH) at the Alps–Apennines junction consist of three different units that are comparable with the Cassio, Caio and Sporno Units of the External Ligurian ...
Barbero, Edoardo, Catanzariti, Rita, D'Onofrio, Roberta, Festa, Andrea, Saccani, Emilio   +4 more
core   +4 more sources

The cases of June 2000, November 2002 and September 2002 as examples of Mediterranean floods [PDF]

, 2006
International audienceFour flood events that affected three different countries are here described in terms of meteorological genesis and in terms of consequences on the population and on the territory.
Ducrocq, Vincent,, Llasat, M. C., Milelli, M.   +2 more
core   +3 more sources

Lithostratigraphy and structural setting of the Inzecca Unit (Schistes Lustrés Complex, Alpine Corsica, France): clues from the Venaco-Altiani area

Journal of Maps
The structural map of Venaco-Altiani area features a well-preserved transect across the Alpine Corsica, ranging from the deepest structural level of the Schistes Lustrés Complex represented by the Upper Castagniccia and Morteda-Farinole Units, to the ...
Rebecca Guelfi, Francesco De Cesari, Alice Maremmani, Maria Di Rosa, Daniele Nannini, Michele Marroni, Luca Pandolfi, Edoardo Sanità   +7 more
doaj   +1 more source

Fluid inclusion study of the Boccassuolo VMS-related stockwork deposit (Northern-Apennine ophiolites, Italy) [PDF]

, 2015
Several Cyprus-type volcanogenic massive sulphide (VMS) deposits are found in the Jurassic ophiolitic series of the Northern Apennines. Stratabound, stratiform and stockwork deposits were formed in the western limb of the Neotethys (Ligurian Ocean) and ...
Federica Zaccarini, Gabriella B. Kiss, Giorgio Garuti   +2 more
core   +2 more sources

Progressive deformation patterns from an accretionary prism (Helminthoid flysch, Ligurian Alps, Italy) [PDF]

, 2020
This paper reports the results of a field-based structural investigation of a well-exposed paleo-accretionary prism, which experienced complex deformation in a low-grade metamorphic setting. Field analyses focused on the description of structural fabrics,
Maino M., Mueller P., Seno S.
core   +2 more sources

Influence of flow containment and substrate entrainment upon sandy hybrid event beds containing a co-genetic mud-clast-rich division [PDF]

, 2015
Individual sandstone beds containing a co-genetic mud-clast-rich (MCR) division are being increasingly described from the distal reaches of many deep-water fan systems.
Alexander, Amy, Amy, Andreoni, Athmer, Barker, Baruffini, Bersezio, Biella, Bouma, Bridgwater, Brunt, Bryant, Butler, Cavanna, Davies, Davis, Di Giulio, Druitt, Edwards, F. Felletti, Faltinsen, Felletti, Felletti, Felletti, Felletti, Flemings, Gamberi, Garcia, Gray, Haughton, Haughton, Haughton, Haughton, Hiscott, Hodgson, Ibbeken, Jackson, Jobe, Kneller, Kneller, Kneller, Kneller, Kneller, Lamb, Lamb, Lowe, Lowe, M. Patacci, Maino, McCaffrey, Middleton, Muzzi Magalhaes, Pantin, Patacci, Pickering, Postma, Ricci Lucchi, Ricci Lucchi, S.J. Southern, Scheidegger, Sequeiros, Sinclair, Smith, Stocchi, Sylvester, Talling, Talling, Talling, Talling, Talling, Tinterri, Toniolo, Toniolo, Van Andel, W.D. McCaffrey, Walker, Yokokawa, Yokokawa   +78 more
core   +1 more source