Question

What are fossils of organisms that existed over a wide area but for only a limited

Answer 1

Index fossils are the fossils of organisms that existed over a wide area but only for a limited time period.

Explanation:

The index fossils are fossils that are of huge use for the scientists of all fields when it comes to the Earth's history and its reconstruction. These fossils have this name because they are good indicators about a particular time period. The scientists are able to determine a geological period without even examining the layers, but just by simply finding these fossils.

There are several characteristics that make the index fossils special. They are found over very large area. Not just that they are found in lot of places, but they are also abundant. They existed only for a limited time period, thus being good indicator of a particular geological period. They are easy to distinguish from the other fossils.

The fossils can be divided into five main categories:

• trace fossils
• molds and casts
• petrified fossils
• carbon films
• preserved remains

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Answer 2

Answer:

Index fossils

Explanation:

Index fossils is the right answer

in·dex

/ˈinˌdeks/

noun

1.

an alphabetical list of names, subjects, etc., with references to the places where they occur, typically found at the end of a book.

I all so took the test and got it right.

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