Príklady index fossil

• It has a cosmopolitan distribution and is an important index fossil in biostratigraphy.

• It is used in biostratigraphy as an index fossil.

• The series of deposits that spans the occurrence of a particular index fossil, is often referred to as that fossil's zone, enabling to relate different faunas through time.

• Firstly, index fossils should be temporally restricted, numerically abundant and spatially widespread.

• Apart from conodonts, goniatites are the best index fossils, which have considerably completed the biostratigraphic calibration of our sections.

• An absence of facies bias potentially increases the usefulness of these taxa as index fossils, but their global utility is restricted by their endemism (see above).

• Because certain fossils are solely found in certain layers, they are referred to as index fossils.

• Such index fossils must be distinctive, be globally distributed and have a short time range to be useful.

• Such index fossils must be distinctive, be globally distributed and occupy a short time range to be useful.

• Misleading results are produced if the index fossils are incorrectly dated.

• They are excellent index fossils, and it is often possible to link the rock layer in which they are found to specific geological time periods.

• Some flood geologists dispute geology's assembled global geologic column since index fossils are used to link geographically isolated strata to other strata across the map.

• Fossils are often dated by their proximity to strata containing index fossils whose age has been determined by its location on the geologic column.

• Index fossils are more helpful in providing geologic references or reference markers.

• They have been recorded from every continent and many are used as zonal or index fossils.