most of the research concentrated on marine environments, although it has been suggested that these magnetofossils can be found in terrestrial sediments (derived from terrestrial sources). these magnetofossils can be found throughout the sedimentary record, and therefore are influenced by deposition rate. episodes of high sedimentation, not correlating with an increase in magnetobacterial and thus magnetofossil production, can decrease magnetofossil concentrations vastly, although this is not always the case. an increase in sedimentation normally coincides with an increase of land erosion, and therefore an increase in iron abundance and nutrient supply.