Results 81 to 90 of about 7,350 (205)
El metamorfismo del Paleozoico de la isla de Menorca (Islas Baleares). [PDF]
, 1992 Los materiales paleozoicos del área Hercínica de Menorca han experimentado un metamorfismo de bajo y muy bajo grado (Carbonífero en tránsito a diagénesis (Devónico), cuyas características son establecidas.
Aparicio, A., Brell, J.M., García, R.
core
Microbial mats in dinosaur ichnocoenoses
Sedimentology, EarlyView.ABSTRACT Until now, the significance of microbial mats in preservation of dinosaur tracks and in reconstructing the palaeoenvironment in which dinosaurs roamed was rarely studied. Dinosaur tracks are commonly found close to ancient aquatic bodies where moist sediment had once allowed footstep registration.
Nora Noffke +3 more
wiley +1 more source
Tectosilicatos con características especiales: las zeolitas naturales [PDF]
, 2011 Las zeolitas comprenden un grupo de aluminosilicatos cristalinos e hidratados de aluminio, con cationes alcalinos y alcalino-térreos, y con una ordenación tridimensional (tectosilicatos) donde predomina una estructura abierta que les aporta gran ...
Costafreda Mustelier, Jorge Luis
core +1 more source
Sedimentology, EarlyView.ABSTRACT This research examines the spatial and geochemical interactions between mat‐forming microorganisms and thalassinid shrimp in an intertidal flat situated on the shores of Willapa Bay, Washington, USA. The study serves as a contemporary analog for the relationships between mats and burrowing organisms in deep time.
Brette S. Harris +9 more
wiley +1 more source
Algunas observaciones sobre el significado de los feldespatos en rocas detrítico-terrígenas [PDF]
, 1970 Se analiza el significado de los distintos tipos de feldespatos (potásicos y plagioclasas) en los sedimentos arenosos del Albense y Wealdense de la Cuenca Cantábrica y otras localidades, bajo el punto de vista sedimentario, paleogeográfico y ...
Aguilar Tomás, Mariano José
core +1 more source
Sedimentology, EarlyView.ABSTRACT Thin ferruginous sandy crusts are common on top of sandstone beds in the Early Permian post‐glacial deposits of the Paraná Basin in southern Brazil. These crusts usually preserve wrinkle structures, suggesting that they might be a product of microbial mediation.
Patrícia Weschenfelder +2 more
wiley +1 more source
Cyanobacterial calcite cementation in a tidal channel of the Bay of Cadiz Natural Park [PDF]
, 2008 A study of the carbonated crust located in a tidal channel close to a hypersaline tidal lagoon of the Nature area of the Bay of Cádiz has been done. A textural, mineralogical, and an experimental study, including O2 y pH measurements have been conducted ...
Corzo, Alfonso +3 more
core +1 more source
Sedimentology, EarlyView.ABSTRACT Understanding the biotic and abiotic influences on the deposition and diagenesis of recent microbial carbonates is crucial for addressing the environmental and ecological significance of ancient organosedimentary structures. This study investigates these factors and their expression in the microstructure of Holocene tufa thrombolites from a ...
Paulo Quezada +10 more
wiley +1 more source
Conceptos metodológicos aplicables a la Ingeniería de Petróleos [PDF]
, 2017 This paper seeks to unify the terminology and nomenclature of the pelitic rocks in lithostratigraphic descriptions of the subsoil. It is aimed at students of Petroleum Engineering and related, as a reference material, and all those professionals and ...
Yoris, Franklin Gerardo
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Relaciones entre el ambiente de sedimentación y los procesos diagenéticos en las areniscas del Buntsandstein del Umbral de Ateca (Cordillera Ibérica). [PDF]
, 1990 Los sedimentos de facies Buntsandstein del Umbral de Ateca se depositaron en un medio de transición, en áreas intra y supramareales, dentro de un sistema deltaico dominado por procesos de "crevassing".
Gómez Gras, D., Marfil, Rafaela
core +1 more source