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Herrero Fernández, María Josefa ; Martín Pérez, Andrea ; Gil Peña, Inmaculada ; Alonso-Zarza, Ana María ; Meléndez Hevia, Alfonso ; Martín García, Rebeca | Sociedad Geológica de España | 2010Detailed petrographic observations of Upper Proterozoic –Lower Cambrian deposits of the Castañar de Ibor allows the characterization of the diagenetic history of these rocks. Graywackes, shales and limestones were deposited during the Upper Prot[...]texto impreso
Casado, Ana Isabel ; Alonso-Zarza, Ana María ; Martín Pérez, Andrea | Sociedad Geológica de España | 2018En este trabajo se discute el origen de las estructuras prismáticas de los horizontes nodulares de las dolocretas del área de Paracuellos de Jarama. Estas estructuras son peds verticales o prismas, formados por peds de menor orden, que se encuen[...]texto impreso
Martín Pérez, Andrea ; Martín García, Rebeca ; Alonso-Zarza, Ana María | Società Speleologica Italiana | 2012A drapery speleothem (DRA-1) from Castañar Cave in Spain was subjected to a detailed petrographical study in order to identify its primary and diagenetic features. The drapery’s present day characteristics are the result of the combined effects [...]texto impreso
Alonso-Zarza, Ana María ; Meléndez Hevia, Alfonso ; Martín García, Rebeca ; Herrero Fernández, María Josefa ; Martín Pérez, Andrea | Elsevier Science B.V., Amsterdam | 2012The Upper Miocene (Vallesian–Turolian) Unit II of the Teruel Graben comprises at its top a 25 m-thick sequence of palustrine deposits. Deposition of the entire unit commenced some 9 to 7 Ma ago in a halfgraben basin. Here, via a recent quarry, w[...]texto impreso
Martín Pérez, Andrea ; Alonso-Zarza, Ana María ; La Iglesia, Á. ; Martín García, Rebeca | Sociedad Geológica de España | 2015The speleothems of Castañar Cave are made of a complex mineralogical association including aragonite, dolomite, huntite, hydromagnesite and a small proportion of Mg-rich clays whose mineralogy is difficult to determine. These clays appear as thi[...]texto impreso
Dolomite in caves: Recent dolomite formation in oxic, non-sulfate environments. Castañar Cave, Spain
Dolomite is a common mineral in the rock record but rare in recent superficial environments. Where it does occur, it is related to anoxic, sulfate-rich environments and microbial activity. The occurrence of some dolomite deposits in caves, howev[...]texto impreso
Martín Pérez, Andrea ; Martín García, Rebeca ; Alonso-Zarza, Ana María ; Herrero Fernández, María Josefa | Springer Verlag | 2010In Castaiiar Cave (Caceres, Spain), coatings of red clays cover the walls of the chambers, coexisting with diverse speleothems of aragonite, calcite, huntite and dolomite. The mineralogy of the clays is mainly illite, chlorite, kaolinite, smecti[...]texto impreso
Martín Pérez, Andrea ; Martín García, Rebeca ; Alonso-Zarza, Ana María | Sociedad Geológica de España. | 2008En la cueva de Castañar de Ibor (Cáceres), aparecen una gran variedad de espeleotemas de aragonito, calcita, dolomita, huntita y magnesita. Muchos de estos minerales son de origen primario, pero también se han observado transformaciones diagenét[...]texto impreso
Huerta, Pedro ; Martín Pérez, Andrea ; Martín García, Rebeca ; Rodríguez Berriguete, Álvaro ; La Iglesia, Á. ; Alonso-Zarza, Ana María | Elsevier | 2019-04-01Lava tubes from Lanzarote Island in the Canary Archipelago commonly show white speleothems that stand out from the black basaltic rock. Mineralogical analyses of the speleothems from El Covón and Chifletera lava tubes show that gypsum is the dom[...]texto impreso
Geochemical signals from speleothems are commonly used in the investigation of palaeoenvironments. In most cases, however, little attention is paid to whether or not these signals are primary or altered by diagenesis. The speleothems of the Cast[...]texto impreso
Alonso-Zarza, Ana María ; Genise, J.F. ; Cabrera, M.C. ; Mangas, J. ; Martín Pérez, Andrea ; Valdeolmillos Rodríguez, Ana ; Dorado Valiño, M. | Elsevier | 2008-07-31The Pleistocene dune field of Tufia, located on the east of Gran Canaria (Spain), contains different stratigraphic levels of indurated pillar-like structures that are interpreted as megarhizoliths. The megarhizoliths occur at the top of differen[...]texto impreso
Martín García, Rebeca ; Alonso-Zarza, Ana María ; Martín Pérez, Andrea | Sociedad Geológica de España | 2007-05The aragonite and calcite speleothems of the Castañar de Ibor Cave show white and matt coatings that formed by micritization and dissolution of the initial crystals. These processes are also recognised in the inner part of the speleothems. Eithe[...]texto impreso
Martín García, Rebeca ; Alonso-Zarza, Ana María ; Martín Pérez, Andrea | Sociedad Geológica de España | 2007-05The aragonite and calcite speleothems of the Castañar de Ibor Cave show white and matt coatings that formed by micritization and dissolution of the initial crystals. These processes are also recognised in the inner part of the speleothems. Eithe[...]texto impreso
Alonso-Zarza, Ana María ; Zhao, Z. ; Song, C. H. ; Li, J. J. ; Zhang, J. ; Martín Pérez, Andrea ; Martín García, Rebeca ; Wang, X. X. ; Zhang, Y. ; Zhang, M. H. | Elsevier | 2009The Tianshui Basin in central China contains a thick sedimentary sequence (~1400 m) of continental deposits, Aragonian to Villafranchian (Miocene-Pliocene) in age. Intense Himalayan movements around the Paleogene/Miocene boundary triggered the u[...]texto impreso
Alonso-Zarza, Ana María ; Martín García, Rebeca ; Martín Pérez, Andrea ; Olmeda Zafrilla, Paula ; Fernández Amo, Francisco J. | Sociedad Geológica de España | 2018Las cuevas que forman el Monumento Natural Cuevas de Fuentes de León se desarrollaron en una sucesión cámbrica detrítico-carbonática, que incluye algunas dolomías. Cueva Masero es una de las de mayor tamaño y contiene una amplia variedad de espe[...]
