Results 51 to 60 of about 14,984 (154)

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

Reactividad geoquímica en barreras de ingeniería compuestas por hormigón y bentonita

, 2005
Tesis doctoral inédita leída en la Universidad Autónoma de Madrid, Facultad de Ciencias, Departamento de Química Agrícola, Geología y Geoquímica.
Sánchez Calvo, Laura
core   +1 more source

Relaciones entre porosidad, contenido en arcillas y durabilidad de areniscas

Materiales de Construccion, 1985
The petrographical characterization of three spanish sandstones from Villamayor (Salamanca), Somió and Tazones (Asturias) is presented. The significance of the percentage and type of the clay minerals cementing the grains on the pore system geometry, for
R. M. Esbert, J. Ordaz, L. Valdeón
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

Marcadores geoquímicos na distinção estratigráfica e suas aplicações em geomorfologia

Revista de Geografia (Recife)
A geoquímica focada na paisagem surgiu na Rússia na metade do século XX, visando entender a dinâmica das formações superficiais por meio da análise de elementos químicos.
Daniel Rodrigues de Lira, Antonio Carlos de Barros Corrêa, José Danilo da Conceição Santos, Drielly Naamaa Fonseca   +3 more
doaj   +1 more source

Comportamiento geoquímico de las formaciones salinas bajo el efecto de la temperatura y la irradiación

Estudios Geologicos, 1993
La generación de defectos cristalinos y la migración de las fases fluidas (salmueras y gases), son los efectos más relevantes de la irradiación y la temperatura sobre una formación salina, susceptible de albergar un almacenamiento de residuos radiactivos.
C. de las Cuevas, L. Miralles, P. Teixidor, J. García Veigas, J. J. Pueyo   +4 more
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

Formación de sepiolita-paligorskita en litofacies lutítico-carbonáticas en el sector de Borox-Esquivias (cuenca de Madrid)

Estudios Geologicos, 1988
En el área estudiada, desde un punto de vista litológico se han diferenciado tres tramos: a) Lutítico. Lutitas verdes y rosáceas con intercalaciones samíticas e incipiente desarrollo de calcretas.
J. L. Martín de Vidales, M. Poro, J. A. Medina, S. Leguey   +3 more
doaj   +1 more source

A strong CO₂ sink enhanced by eutrophication in a tropical coastal embayment (Guanabara Bay, Rio de Janeiro, Brazil) [PDF]

Biogeosciences, 2015
In contrast to its small surface area, the coastal zone plays a disproportionate role in the global carbon cycle. Carbon production, transformation, emission and burial rates at the land–ocean interface are significant at the global scale but still ...
L. C. Cotovicz Jr., B. A. Knoppers, N. Brandini, S. J. Costa Santos, G. Abril   +4 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