Results 51 to 60 of about 575 (118)

THE LATE TRIASSIC-HETTANGIAN BIVALVES TURNOVER IN LOMBARDY (SOUTHERN ALPS)

open access: yesRivista Italiana di Paleontologia e Stratigrafia, 2017
One of the major mass extinctions of the Phanerozoic took place at the Rhaetian-Hettangian boundary. According to some researchers, it might have been preceded by a minor event at the end of the Carnian. The faunal association present in the Late Trixsic
ANDREA ALLASINAZ
doaj   +1 more source

A Middle Triassic Cassian‐type fauna (Pelsa‐Vazzoler Lagerstätte) and the adaptive radiation of the Modern evolutionary fauna

open access: yesPapers in Palaeontology, Volume 10, Issue 4, July/August 2024.
Abstract We describe a high‐diversity silicified assemblage of marine molluscs (Pelsa‐Vazzoler Lagerstätte) from the upper Ladinian of the Agordo Dolomites (northeastern Italy). New data on the Triassic rebound, after the end‐Permian mass extinction, constrain it to an interval of relatively stable climatic conditions.
Stefano Dominici   +2 more
wiley   +1 more source

Co‐precipitation of primary dolomite and Mg‐rich clays in Deep Springs Lake, California

open access: yesSedimentology, Volume 71, Issue 4, Page 1363-1383, June 2024.
ABSTRACT In contrast to the prevalence of dolomite [CaMg(CO3)2] in the geological record, there are few instances of recent formation. This discrepancy occurs despite supersaturation with respect to dolomite in many modern marine and lacustrine environments.
Franklin W. C. Hobbs   +4 more
wiley   +1 more source

Degradación y durabilidad de materiales rocosos de edificación en ambientes urbanos [PDF]

open access: yes, 1998
This paper studies the effect of some pollutant agents in urban environments -gaseous SO2, acid rain and solid particles- on carbonate and siliceous building stones with different petrophysic characteristics.
C. M. Grossi   +5 more
core   +1 more source

TIPOS DE LAPIAZ EN UN KARST MEDITERRANEO DE MONTAÑA (SIERRA DE SEGURA, JAÉN)

open access: yesPapeles de Geografí­a, 1985
La importancia de los procesos y formas kársticas en las Cordilleras Béticas ha sido subrayada por numerosos autores. Estos relieves son muy favorables a la karstificación al estar constituidos por series sedimentarias esencialmente calcáreas. La Sierra.
Begoña López Limia   +1 more
doaj  

Análisis de la gestión de rocas del sitio Laguna La Huinca (Cuenca media del arroyo Tapalqué, provincia de Buenos Aires)

open access: yesComechingonia. Revista de Arqueología
En este artículo se presentan los resultados obtenidos del análisis tecno-morfológico y tecnológico efectuado sobre el conjunto lítico proveniente de recolecciones superficiales en distintos sectores del sitio Laguna La Huinca, ubicado en la cuenca media
María José Colantonio Gonard
semanticscholar   +1 more source

Tectonic Evolution of the Eastern Southern Alps (Italy): A Reappraisal From New Structural Data and Geochronological Constraints

open access: yesTectonics, Volume 43, Issue 3, March 2024.
Abstract The Eastern Southern Alps fold‐and‐thrust belt (ESA) is part of the seismically active S‐verging retro‐wedge of the European Alps. Its temporal tectonic evolution during continental shortening has so far been constrained by few and low‐resolution indirect time constraints.
Manuel Curzi   +7 more
wiley   +1 more source

Evaluación del tratamiento de consolidación de dolomías mediante nanopartículas de hidróxido de calcio en condiciones de alta humedad relativa

open access: yesBoletín de la Sociedad Española de Cerámica y Vidrio, 2011
In this article, the results of a treatment applied to dolomitic stones using an isopropyl colloidal solution based on calcium hydroxide nanoparticles with a concentration of 2.0g/l are presented.
Fort, R.   +4 more
doaj   +1 more source

Aplicación de la Tomografía Axial Computerizada de Rayos X al estudio de materiales rocosos [PDF]

open access: yes, 1999
Se han sometido muestras de la dolomía de Laspra (una de las rocas utilizadas en la construcción de la Catedral de Oviedo) a ciclos de hielo-deshielo con el fin de estudiar la aplicabilidad de la tomografía axial computerizada de rayos X al estudio de ...
Rodríguez Rey, Angel   +5 more
core   +2 more sources

Mesozoic gliding and Tertiary basin and range tectonics in eastern Sonora, Mexico

open access: yesGeofísica Internacional, 2015
En el oriente de Sonora, México, se encuen-tran bien preservadas en rocas del Cretácico Superior de la región de Arivechi, estructuras de deformación compleja asociadas a movi-mientos verticales y actividad gravitacional como deslizamientos.
José Luis Rodríguez Castañeda   +2 more
doaj   +1 more source

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