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Quality and morphology of outcrop exposure places fundamental constraints on what ichnological observations can be made and the veracity of these observations. Whilst the limits and potential biases are well known and reported for core studies, in the majority of field studies the equivalent biases are typically overlooked. In this paper we present a widely applicable method for recording outcrop characteristics based on their morphology, and how these characteristics may affect observations. We consider the impacts of structural orientation, superficial cover, and outcrop location on outcrop quality. Finally, we present two case studies, from the Tumblagooda Sandstone of Western Australia and the Armorican Sandstone Formation of northwestern France, to highlight the importance of recording outcrop characteristics. [ABSTRACT FROM AUTHOR]

The Ediacaran-Fortunian ichnofauna from Central Brittany (NW France) is revised for the first time since the pioneering work by Lebesconte at the end of the 19th century. The study is based on fossils from the type-localities of the historical Brioverian taxa Montfortia (traces from Montfort-sur-Meu) and Neantia (wrinkle surfaces from Néant-sur-Yvel), and on two new outcrops from Saint-Gonlay. The ichnofossil assemblage includes Helminthoidichnites tenuis, Helminthopsis tenuis, Gordia marina, Palaeophycus tubularis, ?Neonereites uniserialis, and ?Spirodesmos archimedeus. Locally, the grazing traces are associated with wrinkle surfaces considered as microbially induced sedimentary structures (MISS). The sedimentological characteristics of these deposits correspond to a shelf marine environment. Both U-Pb datings on detrital zircon and ichnostratigraphic criteria tend toward an Ediacaran age of the fossiliferous deposits, but we cannot exclude the possibility of a Fortunian age at the present state of knowledge. [ABSTRACT FROM AUTHOR]