The rock record contains a rich variety of sedimentary surface textures on siliciclastic
sandstone, siltstone and mudstone bedding planes. In recent years, an increasing number …

**phosurans are aquatic chelicerates with a fossil record extending into the Early Ordovician
and known from a total of 88 described species, four of which are extant. Known for their …

To date, microbialites include five groups: stromatolites, thrombolites, leiolites, and
dendrolites. All these microbialites occur in carbonate or silica lithologies. However …

Abstract The Yacoraite Formation (Maastrichtian–Danian; Balbuena Subgroup; Salta
Group), from Northwestern Argentina, represents a shallow epeiric unit which is the result of …

The lowermost part of the Agua de la Mula Member (upper Hauterivian), Agrio Formation,
was studied in distal depositional settings at four locations in the central Neuquén Basin …

Gregarious behaviour among dinosaurs has been inferred from several lines of evidence
(monospecific bonebeds, skeletal morphology, phylogenetic inferences, comparison with …

The seas of the Mesozoic (266–66 Myr ago) were remarkable for predatory marine reptiles,
but their modes of locomotion have been debated. One problem has been the absence of …

Recent work has focused on erecting new Seilacherian ichnofacies for depositional
environments subject to recurring temporal and spatial variations in physico-chemical stress …

Abstract The Agrio Formation (late Early Valanginian–earliest Barremian) is an
environmentally complex marine and continental succession that involves unconformities …

Recently, a paleosurface with microbially-induced sedimentary wrinkle structures that are
associated with abundant, well-preserved, iguanodon-type, tridactyl tracks has been …