Assinaturas icnológicas da sucessão sedimentar Rio Bonito no bloco central da jazida carbonífera de Iruí, Cachoeira do Sul (RS)

Abstract

Figura Complementar 1. Distribuição das icnofábricas ocorrentes nos depósitos da Formação Rio Bonito que compõem o bloco central da jazida carbonífera do Iruí nas seções estratigráficas 1 e 2 traçadas por Kern (2008) e resumo da interpretação estratigráfica e paleoambiental, a partir das assinaturas icnológicas. Supplementary Figure 1. Distribution of ichnofabric occurring in the Rio Bonito Formation deposits that comprise the central block of Iruí coal mine in stratigraphic sections 1 and 2 drawn by Kern (2008), and summary of stratigraphic and palaeoenvironmental interpretation, from ichnological signatures.

Permian macroburrows as microhabitats for meiofauna organisms: an ancient behaviour common in extant organisms

“…3). The CPI is recurrent in the middle portion to the top of the sedimentary succession in the study area which represents the transgressive cycle of the Rio Bonito Formation (Netto 1994(Netto , 1998Elias et al 1999Elias et al , 2000Buatois et al 2001aBuatois et al , 2007Gandini et al 2010). It occurs beneath and between thin mollusc-dominated shell concentrations.…”

“…,, ; Gandini et al . ). They are represented in the study area mostly by ichnofabrics of Asterosoma, Bergaueria, Conichnus, Gyrolithes, Lockeia, Macaronichnus, Palaeophycus, Phycosiphon, Planolites, Rosselia, Siphonichnus , flattened Teichichnus and Thalassinoides (Table ).…”

“…The ichnoassemblage is composed of simple and complex burrows made by facies crossing invertebrates that inhabited shallow marine and marginal marine settings (e.g. Buatois et al 2005;Gandini et al 2010;MacEachern et al 2012). Palaeophycus is one of the most ubiquitous trace fossils in this assemblage and occurs in almost all trace fossil suites preserved in the heterolithic beds.…”

“…It is composed mostly of very fine-to very coarse-grained sandstone with trough and hummocky cross-stratification, conglomerate, fine-grained heterolithic deposits, mudstone (parallel-laminated and massive) and coal seams (e.g. Schneider et al 1974;Lavina et al 1985;Lavina & Lopes 1986;Buatois et al 2001aBuatois et al , 2007Tognoli 2002;Gandini et al 2010;Holz et al 2010).…”

“…Trace fossils of mesohaline and fully marine invertebrate organisms are common in the median and upper portions of the Rio Bonito Formation (Paraguac ßu and Sider opolis members, respectively; e.g. Netto 1994Netto , 1998Buatois et al 2001aBuatois et al ,b, 2007Gandini et al 2010). They are represented in the study area mostly by ichnofabrics of Asterosoma, Bergaueria, Conichnus, Gyrolithes, Lockeia, Macaronichnus, Palaeophycus, Phycosiphon, Planolites, Rosselia, Siphonichnus, flattened Teichichnus and Thalassinoides (Table 1).…”