Index Fossil In A Short Sentence

The finger next to the thumb;

Index fossil in a short sentence. A fossil that is found in many places and comes from the same time in history, so that…. Molds and casts are other types of body fossils. However, misleading results are produced if the index fossils turn out to have longer fossil ranges than first thought.

Fossil analyses have shown, for instance, that some retain organic material dated to the cretaceous, a period that lasted from 65.5 million to 145.5 million years ago, and the jurassic period. So what are the solutions to global warming? Fauna and flora specific to a particular environment make poor index fossils…

Index fossils are fossils used to define and identify geologic periods (or faunal stages). The fossil record shows that cyanobacteria go back three and a half billion years.: A good index fossil is one with four characteristics:

The evolution of the canid and felid brain was studied through examination of fossil and recent cranial endocasts.: Widely distributed (cosmopolitan) an organism with a short geologic ranges (rapid evolution rate) That being said, certain land organisms are useful in young rocks and specific regions.

Index fossil[′in‚deks ‚fäs·əl] (paleontology) the ancient remains and traces of an organism that lived during a particular geologic time period and that geologically date the containing rocks. To compare the relative ages of fossils, scientists use an early recognized species called an index fossil. Index fossils (also known as guide fossils or indicator fossils) are fossils used to define and identify geologic periods (or faunal stages).

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