An analysis of the lithofacies and trace fossils from a Middle Cambrian deltaic sequence in the Cantabrian Mountains, northwest Spain, indicates the importance of energy conditions, as evidenced by bed thickness and the presence of sand/mud alternations, in determining the distribution of trace fossils. This facies control of trace fossils is particularly strong for trilobite tracks and U-rubes.
An analysis of Arenicolites and Diplocraterion demonstrates that the size of the trace fossil can be taken as an indicator of onshore/offshore conditions.
Thirteen ichnogenera are described, including the new ichnospecies Monomorphichnus pectenensis, Rusophycus ramellen-sis, and Teichichnus ovillus.
Figures & Tables
Organisms of one sort or another today inhabit virtually every sediment environment on Earth, and the rock record tells us that this has been the case through the greater part of our planet’s history. Furthermore, organisms leave their mark in most sedimentary settings, either directly in the form of body fossils or indirectly as biogenic structures. In addition to their often profound modifying effects on substrates, ancient biogenic structures preserve a record of organism behavioral activity in response to substrate and other paleoenvironmental controls. Thus, biogenic structures can be highly useful as facies indicators and can provide valuable clues to the interpretation of paleodepositional environments. The purpose of this volume is to present a broad spectrum of case-book examples of the use of biogenic structures in the interpretation of depositional environments.