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Index fossils :)

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Q: Fossils that appear all over the world in certain rock layers are what?
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What two things did 19th century scientists do to determine the relative ages of sedimentary rock all over the world?

They studied fossils and applied the principle that old layers of rock are below young layers! -


What two things did 19th century scientists do to determine the relative age of sedimentary rock all over the world?

They studied fossils and applied the principle that old layers of rock are below young layers! -


What is the principal of paleontological identity?

The Principle of Paleontological Identity is the theory that the layers of sedimentary rocks around the world can be dated by the fossils which they contain. Based on this theory, two layers having the same fossils are regarded as having the same age. This principle is based on the existence of stratigraphic fossils. It is taken in theory to make it possible to correlate sedimentary sequences in distant areas from each other.


How are rock layers used to determine the relative ages of fossils?

The Principle of Superposition argues that rock layers towards the top are younger than those at the bottom. This was the principal technique used in the early days.Fossils have discontinuities - a group will appear, and after a time will vanish again. But very similar fossils appear around the world at the same time.This subject paleontology, has good records, and a newly found fossil can usually be identified by comparison with the paleontological record.Today of course, radiometric dating is used very widely to determine the age of both rocks themselves, and of fossils. These techniques use the half-life of radioactive elements to determine the age.


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How many times the word?

There are an unlimited number of times that any word appears in the world. Certain words appear a certain number of times in a certain piece of literature.


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There are an unlimited number of times that any word appears in the world. Certain words appear a certain number of times in a certain piece of literature.


Where about have fossils been found in the world?

Fossils have been found nearly everywhere in the world because animals die everywhere in the world. Although most fossils that have been fond will have only been a part of it/.


Where do you dig for fossils on animal crossing wild world?

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What Pokémon are in the fossils on Pokémon white?

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What does the principle of superposition tell you about the relative ages of sedimentary rock layers?

Younger layers are deposited on top of older layers, whether the layer is sedimentary or volcanic. Occasionally faults may result in overthrusts, where a series of older layers may be pushed over the top of younger layers. But this is rare. In general, the older layers will be the lower layers.


Where were the hominids fossils were found in the world?

in your mom