On the relationship between ecostratigraphy and zonal stratigraphy
Berry, William B. N.
published: Jun 21, 1983
ArtNo. ESP026001202013, Price: 29.00 €
Ecostratigraphy and zonal stratigraphy ("traditional zonal stratigraphy" to Hoffman 1982) may be considered parts or aspects of the general field biostratigraphy. From zonal stratigraphy come the time units or time frame of reference for other forms of biostratigraphic analysis. Ecostratigraphy, an application of a knowledge of modern ecological relationships and ecologic biogeographic patterns to interpretations of fossils and the rocks bearing them, must be earned out in the context of time units. Ecostratigraphy, therefore, follows after and depends upon zonal stratigraphy. It should not be developed in opposition to zonal stratigraphy, as Hoffman (1982) indicated is happening. The Siluro-Devonian history of intrashelf basins in Idaho and adjacent areas in the western United States illustrates the need to establish a time frame of reference before developing ecostratigraphic relationships. Ecologic biogeographic patterns include depth-reflective biofacies of marine benthic invertebrate faunas. These are used in documenting basin history across a broad area time interval by time interval. Such an ecostratigraphical analysis may be useful in identifying economically useful anoxic basin sediments and reservoir rocks.