Results 191 to 200 of about 61,474 (312)

Enhancing chalk formation integrity by diammonium phosphate treatment. [PDF]

Sci Rep
Desouky M, Aljawad M, Amao A, Solling T, Blinkenberg KH.   +4 more
europepmc   +1 more source

Confirmation of the impact origin of the Late Ordovician Tvären impact structure (southeast Sweden) and emplacement of impactites in a marine setting

Meteoritics &Planetary Science, EarlyView.
Abstract The Tvären structure in southeastern Sweden has been listed as a confirmed marine‐target impact structure for decades. However, to date, no measurements and/or indexed data of planar deformation features in quartz grains from the structure have been published or any other unequivocal evidence of impact.
Katarzyna J. Gajewska, Sanna Alwmark, Mikael Calner, Sylvain Richoz, Jens Ormö, Erik Sturkell, Carl Alwmark   +6 more
wiley   +1 more source

Investigating ancient human DNA preservation on cave walls and in rock art. [PDF]

Nat Commun
Bossoms Mesa A, Essel E, Jáuregui L, Galtier A, Zavala EI, Nota K, Szymanski M, Zorn J, Gomes H, Nash GH, Rosina P, Lattao V, Oosterbeek L, Carpetudo C, Almeida NA, de Las Heras C, Fatás P, Prada A, Díaz-González LM, Sánchez-Moral ME, Martínez Villa A, Menéndez Fernández M, García Arranz JJ, von Petzinger G, Cantalejo P, Fernández LE, Ramos-Muñoz J, Fernández Sánchez DS, Mira HA, Muñoz Fernández E, Montes-Barquín R, Ontañón R, Kelso J, Prüfer K, Vernot B, Hajdinjak M, Shao Q, Garcês S, Collado Giraldo H, Meyer M.   +39 more
europepmc   +1 more source

Polymict melt‐bearing breccia dikes in the Morokweng impact structure formed by slip‐induced mechanical mixing of pseudotachylite and cataclasite along large‐displacement impact faults

Meteoritics &Planetary Science, EarlyView.
Abstract A core drilled through shocked and faulted Archean granitoid gneisses and dolerites in the eroded peak ring of the 70–80 km diameter Morokweng impact structure intersects multiple centimeter‐ to meter‐wide clastic‐matrix breccias containing a polymict clast population of lithic and mineral clasts and altered, millimeter‐ to centimeter ‐size ...
Roger L. Gibson, S'lindile S. Wela, Leonidas C. Vonopartis, Marco A. G. Andreoli   +3 more
wiley   +1 more source

ForamJ - A tool for the reproducible, semi-automated analysis of foraminifera micro computed tomography datasets. [PDF]

Sci Rep
Trend J, Borges FA, Babila TL.
europepmc   +1 more source

Revisiting the Hummeln structure, Sweden—A shallow marine Cambrian impact structure

Meteoritics &Planetary Science, EarlyView.
Abstract Hummeln is a simple impact structure located in south‐eastern Sweden. It is approximately 1.2 km in diameter and almost completely covered by a lake. Here, we present the first detailed investigation of impactites and mapping of the 164.25 m deep drill core Hummeln‐1 with a focus on impact metamorphism and the impact process.
S. Alwmark, J. Granbom, P. Ahlberg, M. Calner, S. Richoz, K. J. Gajewska, W. R. Hyde, K. Ljung, C. Alwmark   +8 more
wiley   +1 more source

Hydrogeochemical processes and water quality of the Aïn Taga Karst Spring, Tlemcen, Northwestern Algeria. [PDF]

Environ Geochem Health
Guettaia S, Boudjema A, Derdour A, Laoufi A, Ahmed AA, Almalki AS, Arafat AA, Ghoneim SSM.   +7 more
europepmc   +1 more source

Impact‐diagnostic criteria for use in confirming a meteorite impact origin of terrestrial geological structures: Recommendations by the Impact Cratering Committee of the Meteoritical Society

Meteoritics &Planetary Science, EarlyView.
Abstract The framework of the Impact Cratering Committee (ICC) of the Meteoritical Society was approved in 2020, with the first committee members appointed in 2023. The ICC has a mandate to (1) approve, maintain, and update a database of confirmed terrestrial meteorite impact structures, (2) define and regularly update the criteria used for ...
A. J. Cavosie, S. Alwmark, D. Baratoux, G. Consolmagno, L. Ferrière, S. Goderis, N. Hauser, T. Kenkmann, C. Koeberl, G. R. Osinski, A. E. Pickersgill, M. Schönbächler   +11 more
wiley   +1 more source

High-strength salt-tolerant mineralisation strain and microbial reinforcement mechanism of saline soil. [PDF]

Sci Rep
Zhang N, Wang X, Xue Y, Li C.
europepmc   +1 more source

Calcite (fluorescent)

Photographed by Ron Wolf.Pale pink-white vitreous calcite, showing fluorescent properties of violet-pink under ultraviolet light (A0179-0329); two views of pale pink-white vitreous calcite: top view shows fluorescent properties of violet-pink under ...
Wolf, Ron
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