Results 41 to 50 of about 4,293 (167)

Paleosuelos de sepiolita en el neógeno de la cuenca de Madrid

Estudios Geologicos, 1989
El análisis de la composición mineral de materiales arcillosos con sepiolita, pone de manifiesto variaciones significativas en el contenido de este mineral, con respecto a esmectitas e illitas, minerales terrígenos (cuarzo y feldespato) y carbonatos ...
S. Leguey, M. Pozo, J. A. Medina
doaj   +1 more source

Written in bones: palaeoclimate histotaphonomic history inferred from a complete Megatherium skeleton preserved in the Atacama Desert

Palaeontology, Volume 68, Issue 4, July/August 2025.
Abstract A nearly complete and relatively well‐preserved skeleton of the giant ground sloth Megatherium sp. in the hyperarid core of the Atacama Desert reveals how climate related taphonomic processes drastically transformed these remains over time.
Luisa Straulino Mainou, Jacqueline Correa‐Lau, Rafael Labarca, Natalia A. Villavicencio, Vivien G. Standen, Susana Monsalve, Paula C. Ugalde, Sergey Sedov, Teresa Pi Puig, Alan Ulises Loredo‐Jasso, Francisco J. Caro, Gabriela M. Jarpa, Patricia Hernández‐Michaud, Claudio Latorre, Calogero M. Santoro   +14 more
wiley   +1 more source

Preservation Factors during Cretaceous Oceanic Anoxic Events in the Espírito Santo Basin, Southeast Brazil

Geosciences, 2022
The oceanic anoxic events (OAEs) are characterized by enhanced accumulation of organic matter in marine sediments. However, there is still an ongoing debate regarding the interplay between production and preservation during these events.
Igor M. Venancio, Thiago P. Santos, Fellippe R. A. Bione, Andre L. Belem, Marcelo C. Bernardes, Rut A. Díaz, Manuel Moreira, Victor Carreira, André Spigolon, Igor V. Souza, Ana Luiza S. Albuquerque   +10 more
doaj   +1 more source

Tracking the Caribbean Magmatic Evolution: The British Virgin Islands as a Transition Between the Greater and Lesser Antilles Arcs

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 6, June 2025.
Abstract The British Virgin Islands (BVI) archipelago, located between the Greater Antilles and the Lesser Antilles, is a key location to study the geodynamic evolution of the Caribbean plate. Geochemistry of the studied samples reveals typical volcanic arc signatures, including a calc‐alkaline affinity, strong negative HFSE anomalies, and LILE ...
Noémie Bosc, Delphine Bosch, Mélanie Noury, Olivier Bruguier, Lény Montheil, Douwe J. J. van Hinsbergen, Jean‐Jacques Cornée, Jonathan Outin, Mélody Philippon   +8 more
wiley   +1 more source

Caracterización geoquímica de la ruptura sedimentaria entre los yesos de la unidad salina e intermedia de la cuenca de Madrid

Estudios Geologicos, 1989
En el Terciario de la Cuenca de Madrid existen dos unidades sedimentarias de carácter yesífero. Ambas unidades están constituidas por yesos con diferentes características, aunque su separación es dificil en diversos afloramientos debido a intensos ...
S. Ordóñez, R. Fort, M. Bustillo
doaj   +1 more source

Inorganic carbon dynamics and their relation to autotrophic community regime shift over three decades in a large, alkaline river

Limnology and Oceanography, Volume 70, Issue 5, Page 1122-1136, May 2025.
Abstract How much of the excess CO2 in running waters comes from in‐stream respiration of organic carbon? To answer this, we developed a 30‐yr metabolism‐carbonate system database at an hourly resolution for the Loire River, France, a large, alkaline river.
Jacob S. Diamond, An Nguyen Truong, Gwenaël Abril, Enrico Bertuzzo, Vincent Chanudet, Raphael Lamouroux, Florentina Moatar   +6 more
wiley   +1 more source

Autoorganización geoquímica: una alternativa sinergética en la modelización de sistemas geológicos. Revisión de principios básicos

Estudios Geologicos, 1989
La autoorganización geoquímica es el reflejo de la aplicación de una Ciencia más amplia, la Sinergética, al campo de la Geología. Se trata de una línea de investigación abierta muy recientemente y, por tanto, su planteamiento se encuentra todavía ...
M. J. Gimeno, J. M. Tena, L. F. Auqué, J. Mandado, J. Fernández   +4 more
doaj   +1 more source

Probiotics mitigate thermal stress- and pathogen-driven impacts on coral skeleton

Frontiers in Marine Science, 2023
Threats leading to a reduction in coral populations are apparent worldwide. Several different approaches have been tested to accelerate the adaptation of corals to a changing climate. Here, we evaluated the skeleton structure, crystal habit, and chemical
Mahdi Moradi, Phillipe R. Magalhaes, Raquel S. Peixoto, Raquel S. Peixoto, Cassia C.A.C. Jonck, Daniel François, Anna Clara F. Bellot, Jonatã B. Teixeira, Carla S. Silveira, Gustavo Duarte, Gustavo Duarte, Heitor Evangelista, Catia F. Barbosa   +12 more
doaj   +1 more source

Rift‐Related Low‐Pressure–High‐Temperature Granulite Facies Metamorphism Generates Widespread Peraluminous Crustal Melts: Evidence From the Early Jurassic Mexican Crust

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 5, May 2025.
Abstract High heat fluxes occurring in rift settings are expected to generate partially melted low‐pressure–high‐temperature granulites (LP–HTG). Therefore, studying these rocks can offer valuable insights into crustal reworking during extension. However, our interpretations are limited by the rarity of LP–HTG in the metamorphic record.
Anthony Ramírez‐Salazar, Mattia Parolari, Arturo Gómez‐Tuena, Fernando Ortega‐Gutiérrez, Mariano Elías‐Herrera   +4 more
wiley   +1 more source

Sargassum beaching on mangrove sediments shifts microbial and crab metabolisms and enhances blue carbon storage

Limnology and Oceanography, Volume 69, Issue 12, Page 2941-2953, December 2024.
Abstract Benthic metabolism and net carbon accumulation in mangroves sediments strongly depend on the quantity and quality of organic matter (OM) supplied, including material brought by coastal waters such as the macroalgae Sargassum spp. Mesocosms were used to assess the effect of eutrophication by Sargassum on mangrove sediments. The concentration of
Mathias Chynel, Gwenaël Abril, Mélissa Narayaninsamy, Loris Deirmendjian, Frédéric Guérin, Charlotte Dromard, Tarik Meziane   +6 more
wiley   +1 more source