Título :	Coprólitos dos sítios paleontológicos Peirópolis e Serra da Galga (membro Serra da Galga, Formação Marília) da região de Uberaba, Minas Gerais, Brasil
Otros títulos :	Coprolites from the paleontological sites Peirópolis and Serra da Galga (Serra da Galga member, Marília Formation) of Uberaba, Minas Gerais, Brazil
Autor :	Oliveira, Fábio Antônio de
Orientador(es)::	Santucci, Rodrigo Miloni
Assunto::	Formação Marília Sítios paleontológicos Tafonomia
Fecha de publicación :	26-jul-2016
Data de defesa::	20-abr-2016
Citación :	OLIVEIRA, Fábio Antônio de. Coprólitos dos sítios paleontológicos Peirópolis e Serra da Galga (membro Serra da Galga, Formação Marília) da região de Uberaba, Minas Gerais, Brasil. 2016. xvii, 107 f., il. Dissertação (Mestrado em Geologia)—Universidade de Brasília, Brasília, 2016.
Abstract:	The region of Uberaba, Minas Gerais state, contains a rich maastrichtian vertebrate fauna collected from rocks of the Serra da Galga Member, MariliaFormation, Bauru Group. Despite the great faunal diversity, the fossil record ofplants, except for a few exceptions, is completely unknown. Together with vertebrate fossils, a large amount of coprolites has been also found in two locations, here called Peirópolis Site and Serra da GalgaSite. There are few studies about these coprolites until now. In this study, 340 samples has been collected, prepared, and analyzed in the laboratory. Parameters such as weight, density, chemical composition, and content were determined. From this samples, 199 true coprolites have been identified whereas 141 samples have been assigned as to inorganic nodules (pseudocoprolites). Some coprolite samples were selected and subjected to a palynological preparation by using HCl 10% and HF 40%. The coprolites were divided into four morphotypes, commonly associated with varied shapes and sizes organisms. The taphonomic study based on morphological characters such as wear, presence or casts of pebbles, and dissecation cracks revealed the occurrence of time averagingand spatial mixingfor the samples of both sites. Moreover, we also present the first clues on how the vegetation, at the time of deposition of the rocks of the Peirópolis and Serra da Galga sites, looked like. The following palynological types were found: Classopollis, Equisetosporites, Gnetaceaepollenites, Cycadopites, and Podocarpidites. This palynomorph set shows that the vegetation was represented by shrubby elements (gnetophytes), arboreal (conifers), and cycads living in an arid climate environment. Apparently, the coprolites deposited in a place with the presence of pebbles underwent long exposure periods,as indicated by the palynomorphs found inside them. Afterwards, they were transported during periods of higher humid. The same taphonomic pattern may have occurred to other fossil in these sites, which occur in high abundance on the region. Thus, this taphonomic aspect becomes an important parameter to be taken into account in future studies about the biota found in these deposits.
metadata.dc.description.unidade:	Instituto de Geociências (IG)
Descripción :	Dissertação (mestrado)—Universidade de Brasília, Instituto de Geociências, Pós-Graduação em Geologia, 2016.
metadata.dc.description.ppg:	Programa de Pós-Graduação em Geologia
Licença::	A concessão da licença deste item refere-se ao termo de autorização impresso assinado pelo autor com as seguintes condições: Na qualidade de titular dos direitos de autor da publicação, autorizo a Universidade de Brasília e o IBICT a disponibilizar por meio dos sites www.bce.unb.br, www.ibict.br, http://hercules.vtls.com/cgi-bin/ndltd/chameleon?lng=pt&skin=ndltd sem ressarcimento dos direitos autorais, de acordo com a Lei nº 9610/98, o texto integral da obra disponibilizada, conforme permissões assinaladas, para fins de leitura, impressão e/ou download, a título de divulgação da produção científica brasileira, a partir desta data.
DOI:	http://dx.doi.org/10.26512/2016.04.D.21025
Aparece en las colecciones:	Teses, dissertações e produtos pós-doutorado

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