摘要
Biostratigraphy is based on the appearance and disappearance of species, and biostratigraphic correlation has a resolution of ~1 myr. Sequence stratigraphy is based on the interaction of sealevel change, stratigraphic architecture, and accommodation modulated by Milankovic cyles. Sequence stratigraphic correlation has a resolution of 0.2 myr. This paper discusses the theoretic foundation, methodology, stratigraphic resolution, and limitation of ichnostratigraphy.