Author(s): Horodyski, Rodrigo Scalise ; Brett, Carlton E. ; Sedorko, Daniel ; Bosetti, Elvio Pinto ; Scheffler, Sandro Marcelo ; Ghilardi, Renato Pirani [UNESP] ; Iannuzzi, Roberto
Date: 2019
Persistent ID: http://hdl.handle.net/11449/188156
Origin: Oasisbr
Subject(s): Macroinvertebrates; Paleoclimatology; Paleogeography; Paleozoic; Taphonomy; Winter storms
Made available in DSpace on 2019-10-06T15:59:04Z (GMT). No. of bitstreams: 0 Previous issue date: 2019-01-15
State Key Laboratory of Materials- Oriented Chemical Engineering
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Taphofacies of Malvinokaffric macroinvertebrate-bearing rocks from the uppermost Pragian to lower Givetian in southwestern Gondwana are evaluated. During the Lower/Middle Devonian, the Paraná Basin (southern Brazil) was positioned at high latitudes in southwestern Gondwana (60° to 80°S). Integrated litho- and taphofacies interpretations in siliciclastic environments presented here provide paleoecological and paleoenvironmental insights. The six taphofacies recognized here showed changing depositional conditions in paleoenvironments ranging from shoreface to offshore shelf settings. They vary in recurrence and abundance, but all facies exhibit evidence of storm events. Winter storms are to be expected at latitudes 60° to 80° S under cool climate zone. Storm-related taphofacies recurrence during the latest Pragian to early Givetian points to two agents of sedimentation, direct wave erosion by winter storms and sedimentary processes related to combined flow during deposition (e.g. turbidity currents and oscillatory flow). Winter storms are considered more capable of affecting sediment transport than hurricanes, due to longer duration and larger coverage area in higher latitudes. Therefore, winter storms of high latitudes should generate more persistent currents in space and time. Finally, the taphofacies, lithofacies and high-latitude paleogeographic context of the Paraná Basin suggest the action of storm-influence in the genesis of all Lower/Middle Devonian Malvinokaffric assemblages here recognized.
Universidade do Vale do Rio dos Sinos Programa de Pós-Graduação em Geologia, Av. Unisinos, 950, Cristo Rei, Caixa-postal: 275
Department of Geology University of Cincinnati
Universidade Estadual de Ponta Grossa Departamento de Geociências, Av. Carlos Cavalcanti 9.500, Uvaranas
Museu Nacional - UFRJ Departamento de Geologia e Paleontologia, Parque Quinta da Boa Vista, sem número, São Cristóvão
Universidade Estadual Paulista Júlio de Mesquita Filho Faculdade de Ciências de Bauru Departamento de Ciências Biológicas UNESP, Av. Eng. Luiz Edmundo Carrijo Coube, s/n
Universidade Federal do Rio Grande do Sul Instituto de Geociências, Av. Bento Gonçalves 9500, Bloco I, Prédio 43113, Campus do Vale
Universidade Estadual Paulista Júlio de Mesquita Filho Faculdade de Ciências de Bauru Departamento de Ciências Biológicas UNESP, Av. Eng. Luiz Edmundo Carrijo Coube, s/n
State Key Laboratory of Materials- Oriented Chemical Engineering: 04/2007
CNPq: 141256/2010-9
CNPq: 401796/2010-8
CNPq: 401831/2010
CNPq: 553033/2011-5
CAPES: 88887.129752/2016-00
CAPES: 88887.154071/2017-00
CNPq: PQ 309211/2013-1
