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.

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This paper discusses the facies distribution of Mesozoic eolian sandstones between the Sanga do Cabral and Botucatu formations and also their contact relationships, in São Leopoldo area, State of Rio Grande do Sul (RS), southern Brazil. The main distinctive characteristics regarding these sandstones and formations are the mineralogical composition, paleocurrents and the occurrence of wet interdune deposits. These interdune deposits are characterized by frequent thin mudstone layers with mudcracks, ichnofossils and salt impressions. There are also some features that resemble plant fossils. The distinctive characteristics of these sequences to Sanga do Cabral and Botucatu formations allow us to suggest the informal name of Pedreira Sandstone, considering its type section, the Pedreira Cliff, at Sapucaia do Sul, RS.

The upper portion of the Cuyo Group in the Zapala region, south-eastern Neuqu en Basin (Western Argentina), encompasses marine and transitional deposits (Lajas Formation) overlain by alluvial rocks (Challac o Formation). The Challac o Formation is covered by the Mendoza Group above a secondorder sequence boundary. The present study presents the stratigraphic framework and palaeophysiographic evolution of this Bajocian to Eo-Calovian interval. The studied succession comprises the following genetic facies associations: (i) offshore and lower shoreface-offshore transition; (ii) lower shoreface; (iii) upper shoreface; iv) intertidal-subtidal; (v) supratidal-intertidal; (vi) braided fluvial to delta plain; (vii) meandering river; and (viii) braided river. The stratigraphic framework embraces four third-order depositional sequences (C1 to C4) whose boundaries are characterized by the abrupt superposition of proximal over distal facies associations. Sequences C1 to C3 comprise mostly littoral deposits and display well-defined, small-scale transgressive-regressive cycles associated with fourth-order depositional sequences. Such high-frequency cycles are usually bounded by ravinement surfaces associated with transgressive lags. At last, the depositional sequence C4 delineates an important tectonic reorganization probably associated with an uplift of the Huincul Ridge. This is suggested by an inversion of the transport trend, northwestward during the deposition of C1 to C3 depositional sequences (Lajas Formation) to a south-west trend during the deposition of the braided fluvial strata related to the C4 depositional sequence (Challac o Formation).

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