index fossils sentence in Hindi
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- These groups once served as vital index fossils, which made it possible to identify feasible life span to multiple strata of the Triassic strata.
- Some of them are useful as index fossils, such as " Favreina " from the Jurassic period of Haute-Savoie in France.
- Goniatites are found in North America, Europe, North Africa and Australasia where they are used as index fossils in age determination and stratigraphic correlation.
- It was characterised by ubiquitous plant genera such as the index fossil " Archaeopteris ", which has also been collected from Waterloo Farm.
- A useful index fossil, this tree is found in strata dating from the Upper Devonian to Lower Carboniferous ( ), and has a global distribution.
- Index fossils are species of plants or animals that existed over a wide area for a geologically short period of time ( Russell and Parks 1975 ).
- Through these efforts, her impact was large enough that her fossil descriptions can be used to identify index fossils for the Ordovician and Silurian geologic periods.
- The authors of the study recommended a reevaluation of the Green Point GSSP section, as well as possible redefinitions of the associated horizons using other index fossils.
- Index fossils ( also known as guide fossils, indicator fossils or zone fossils ) are fossils used to define and identify geologic periods ( or faunal stages ).
- He is considered to have founded the study of zone stratigraphy and the use of index fossils, a term which he created, to compare the different strata.
- Along with this sedimentary correlation, they noted that the best index fossils to identify the biota are " Peipiaosteus " and " Lycoptera ".
- Ammonites are excellent index fossils, and it is often possible to link the rock layer in which a particular species or genus is found to specific geologic time periods.
- Ammonites are excellent index fossils, and it is often possible to link the rock layer in which a particular species or genus is found to specific geological time periods.
- Some echinoids, such as " Micraster ", which is found in the Cretaceous period Chalk Formation of England and France, serve as zone or index fossils.
- The best index fossils are common, easy to identify at species level and have a broad distribution otherwise the likelihood of finding and recognizing one in the two sediments is poor.
- 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.
- The use of index fossils became a powerful tool for making geological maps, because it allowed geologists to correlate the rocks in one locality with those of similar age in other, distant localities.
- Because they appeared quickly in geological time, and moulted like other arthropods, trilobites serve as excellent index fossils, enabling geologists to date the age of the rocks in which they are found.
- Usually one or more index fossils that are common, found worldwide, easily recognized, and limited to a single, or at most a few, stages are used to define the stage's bottom.
- Some belemnoids ( such as " Belemnites " of Belemnitida ) serve as index fossils, particularly in the Cretaceous Chalk Formation of Europe, enabling geologists to date the age the rocks in which they are found.
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