This text investigates the complex relationship between living marine organisms and their sedimentary environments to establish a framework for interpreting the fossil record. Wilhelm Schafer, a prominent marine biologist and paleontologist, synthesizes decades of field observations from the North Sea to demonstrate how biological activity dictates the physical characteristics of marine deposits. The work argues that understanding modern ecological processes is a prerequisite for accurate paleoecological reconstruction.

Experts recognize this work as a foundational text for understanding the field of ichnology and taphonomy. Readers frequently note the technical density of the prose, which requires a strong background in geology or biology to fully comprehend the detailed observations.