Mikulas (1991, 1998) ranged the ichnofossil assemblages, though with some reservations, to a transition from the Cruziana to the Zoophycos ichnofacies
The associated fossil logs have intense bioturbation of the Terodolites ichnofacies
types in softground marine settings, substrate-controlled situations, and softground continental environments are discussed, and a facies model for the ichnofacies
paradigm leads to an explanation of settings, such as the progradational wave-storm dominated coast in which the authors integrate ichnology with facies analysis and genetic stratigraphy.
Traces in the Hoover Quarry indicate Scoyenia-Skolithos-composite ichnofacies
, elements of which are commonly produced in continental firmground environments.
These 2 distinct behavioral patterns are thought to have produced the ichnofacies
Psilonichnus and Skolithos fossil traces, respectively (Martin 2006).
The assemblage is considered to belong to the Cruziana ichnofacies
This bed is both underlain and overlain by fine quartz sandstone, interbedded with micaceous siltstone beds, some of which preserve a well-developed Cruziana ichnofacies
They describe the magnetic polarity time scale across the Permian-Triassic boundary, two remarkable Permian petrified forests, global Permian tetrapods, the climate of the region now known as Europe, tetrapod ichnofacies
, footprint comparisons by region, amphibians, fishes of continental basins, Permian to Triassic sequences in Europe, the singular questions of transitions in France, implications from findings in Morocco, and the record left by insects.
Morphology and paleoenvironmental distribution of Paleozoic Spirophyton and Zoophycos: implications for the Zoophycos ichnofacies
Similarities between the ichnofaunas reflect the continental depositional setting of the two successions, in which trace-makers produced a Scoyenia ichnofacies
A number of papers are based on ichnofabric analysis, an approach to documenting the relative chronology and intensity of infaunal tiering that is enjoying a vogue among ichnologists, but papers that maintain the traditional ichnological emphasis on Seilaeherian ichnofacies
are also represented.
Papers discuss the recognition of stratigraphical surfaces in shallow to marginal marine depositional systems and in non-marine systems; the use of the ichnofacies
concept to determine paleobathymetry; the study of ichnofabrics as developed in sedimentary rocks through pedogenic and biogenic processes; ichnological interpretation of ancient depositional environments (from deep water to non-marine settings), and the change of trace fossil assemblages over time.