Dating fossil framework man

16-Apr-2018 03:50

The basis for assuming that like fossils indicate contemporary formation is faunal succession.

However, as previously noted, times of volcanism and metamorphism, which are both critical parts of global processes, cannot be correlated by fossil content.

Nevertheless, there is no greater testimony to the validity of fossil-based stratigraphic geology than the absolute dates made possible through radioactive measurements.

Almost without exception, the relative order of strata defined by fossils has been confirmed by radiometric ages.

Failing that, the repetition of a certain layered sequence (e.g., a black shale sandwiched between a red sandstone and a white limestone) lends confidence to physical correlation.

To this day, fossils are useful as correlation tools to geologists specializing in stratigraphy.

In dating the past, the primary value of fossils lies within the principle of faunal succession: each interval of geologic history had a unique fauna that associates a given fossiliferous rock with that particular interval.

The basic conceptual tool for correlation by fossils is the index, or guide, fossil.

Correlation is, as mentioned earlier, the technique of piecing together the informational content of separated outcrops.

When information derived from two outcrops is integrated, the time interval they represent is probably greater than that of each alone.

To this day, fossils are useful as correlation tools to geologists specializing in stratigraphy.In dating the past, the primary value of fossils lies within the principle of faunal succession: each interval of geologic history had a unique fauna that associates a given fossiliferous rock with that particular interval.The basic conceptual tool for correlation by fossils is the index, or guide, fossil.Correlation is, as mentioned earlier, the technique of piecing together the informational content of separated outcrops.When information derived from two outcrops is integrated, the time interval they represent is probably greater than that of each alone.From an examination of such outcrops with special focus on the sequence of animal forms comes the empirical generalization that the faunas of the past have followed a specific order of succession, and so the relative age of a fossiliferous rock is indicated by the types of fossils it contains.