Permineralización en restos de dinosaurios preservados en depósitos de desbordamiento de la Formación Bajo Barreal (Cretácico Superior), Patagonia central, Argentina.

Abstract

The fossil deposit Cañadón Las

Kaijutitan Maui, Un Saurópodo Titanosaurio Del Cretácico Superior (Formación Sierra Barrosa, Cuenca Neuquina) Del Norte De Patagonia Argentina: Consideraciones Tafonómicas Y Análisis Histológico

“…This is consistent with the characteristics of the pelitic facies of the Sierra Barrosa Formation that would have developed in periods of water deficit, favoring the production of fine condensatetype deposits and the generation of channels with low carrying capacity (Milana, 1994;Garrido, 2011). In the distal floodplain, deposits are characterized by a low sedimentation rate with little to no degree of bone mobilization (Casal et al, 2014b). There, sedimentation occurs mainly by settling of fine particles or sporadic overflow that reaches distal areas far from the channel.…”

Laboratorio Y Museo De Dinosaurios De La Universidad Nacional De Cuyo: Fundación, Historia Y Descubrimientos Científicos

“…Se trabaja desde dos enfoques. Por un lado, se analiza la preservación de grandes saurópodos y terópodos, con especial énfasis en la caracterización de modos tafonómicos (González Riga, 1999b;González Riga et al, 2003;González Riga y Astini, 2007;Casal et al, 2013Casal et al, , 2014. En este contexto, es importante el reconocimiento de factores intrínsecos (tamaño y forma de los huesos, puntos débiles de desarticulación, forma de vida) y extrínsecos (ambientes se-…”

Approach to the knowledge of preservation of pleistocenic bone: The case of a Gomphothere cranium from the site of Tepeticpac, Tlaxcala, Mexico

“…Thin sections allowed us to analyze the micromorphology of cortical and trabecular bone as well as the distribution and composition of subsequent layers of sediments. Histological analyses has been extensively used in archaeological and paleontological researches (Chinsamy and Raath, 1992;Hubert et al, 1996;Chinsamy, 1997;Jans, 2008;Lamm, 2007;Guido et al, 2012;Casal et al, 2017;Tomassini et al, 2015, Tomassini et al, 2014Pfretzschner, 2004).…”

“…The study of fossil diagenetic processes from neoformed and precipitated minerals in the vascular cavities of the bone and in the fractures allows to stablish the physical and chemical conditions that existed in the lithosphere during lithification, permineralization, and other fossilization processes (Casal et al, 2017). Thus, it is important to evaluate the conservation state, post mortem alteration and approximately estimate the impact of the transformations in its geochemical and isotopic signatures.…”