Changes

An optimum sequence can be derived by graphically correlating a series of sections and establishing a composite standard—a database of the maximum time-stratigraphic ranges for a particular area under study. A composite standard should provide a relatively complete biostratigraphic representation of geologic time. On graphic correlation plots, apparent hiatuses are defined and quantified in time (composite standard units) by horizontal terraces. Fossil ranges in a composite standard are subject to alteration with each new graphic correlation, making it a complex, evolving database that usually requires computerized data management and applications.

An optimum sequence can be derived by graphically correlating a series of sections and establishing a composite standard—a database of the maximum time-stratigraphic ranges for a particular area under study. A composite standard should provide a relatively complete biostratigraphic representation of geologic time. On graphic correlation plots, apparent hiatuses are defined and quantified in time (composite standard units) by horizontal terraces. Fossil ranges in a composite standard are subject to alteration with each new graphic correlation, making it a complex, evolving database that usually requires computerized data management and applications.

As applied to geologic interpretation, a composite standard (1) unifies biostratigraphic data into a high-resolution time correlation framework and (2) provides a quantitative basis for defining the time significance of faults, unconformities, and other sequence stratigraphic boundaries.

As applied to geologic interpretation, a composite standard (1) unifies biostratigraphic data into a high-resolution time correlation framework and (2) provides a quantitative basis for defining the time significance of faults, [[Unconformity|unconformities]], and other sequence stratigraphic boundaries.

[[:file:applied-paleontology_fig17-28.png|Figure 2]] is a graphic correlation interpretation of well data (tops only).

[[:file:applied-paleontology_fig17-28.png|Figure 2]] is a graphic correlation interpretation of well data (tops only).