Eurypterid palaeoecology: palaeobiological, ichnological
and comparative evidence for a 'mass-moult-mate' hypothesis.
As in the Ardanatz Sandstone unit, the ichnological
analysis of the sandy levels intercalated in the lower part of the Ilundain marls shows abundant ophiomorphids, especially Ophiomorpha isp.
record in Ordovician mudstones: examples from the Cincinnatian strata of Ohio and Kentucky (USA).
Under this framework, in recent times, coal-bearing terrestrial-fluvial sequences of the Barakar Formation are reinterpreted as marine wave-tide influenced deltaic/estuarine deposits, based on different sedimentological and ichnological
features of a marine transgression: middle Miocene rocky shores of Tarragona, Spain.
Thus, the ichnological
character of the Bloomsburg Red Beds suggests a brackish water origin (near a marine shoreline) for the trackway-bearing strata.
This paper reports what appears to be the first ichnological
record of vertebrate activity in the Miocene in east Texas.
The resulting volume is a worthwhile contribution to the ichnological
literature, but one that ultimately aims higher than it reaches.
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.
An interesting ichnological
feature of the Baltic Group is the lack of traditional arthropod-type trace fossils.