Description: Index fossil, any animal or plant preserved in the rock record of the Earth that is characteristic of a particular span of geologic time or environment. A useful index fossil must be distinctive or easily recognizable, abundant, and have a wide geographic distribution and a short range through time. Index fossils are the basis for defining boundaries in the geologic time scale and for the correlation of strata.
Description: Index fossils (also known as guide fossils or indicator fossils) are fossils used to define and identify geologic periods (or faunal stages). Index fossils must have a short vertical range, wide geographic distribution and rapid evolutionary trends. Another term, Zone fossil is used when the fossil have all the characters stated above except wide ...
Description: Index fossil definition, a widely distributed fossil, of narrow range in time, regarded as characteristic of a given geological formation, used especially in determining the age of related formations.
Description: Characteristics of an Index Fossil . A good index fossil is one with four characteristics: it is distinctive, widespread, abundant, and limited in geologic time. Because most fossil-bearing rocks formed in the ocean, the major index fossils are marine organisms. That being said, certain land organisms are useful in young rocks and specific regions.
Description: index fossil (zone fossil) An animal fossil of a group that existed continuously during a particular span of geological time and can therefore be used to date the rock in which it is found. Index fossils are found chiefly in sedimentary rocks.
Description: index fossil meaning: 1. a fossil that is found in many places and comes from the same time in history, so that…. Learn more.
Description: Characteristics of a good index fossil Index fossils (also called type fossils or key fossils) are those that are used to define periods of geologic time. A good index fossil is one with five characteristics: it is distinctive; globally widespread; abundant ; limited to a particular geologic time and; is robust and preserves well
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