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absolute age
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∙ 8y ago
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∙ 9y agorelative dateing
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What types of dating estimates the age of a rock or fossil?
The rough estimating of the age of a fossil or rock containing fossils is called relative dating, and is based on the position of the rock or fossil in undisturbed sedimentary strata which contains what are called 'index fossils', fossils that only appear in specific geologic time periods.
How can index fossils be used to date rock?
Because if you know how old the fossil is, and you find the fossil inside a rock, you know that rock has a maxium age corresponding with the age of the fossil.
Definition of absolute dating?
age of a rock unit in number of years before present (numerical age).
A fossil that is found in the rock layers of only one geologic age and that is used to establish the age of the rock layers?
An index fossil.
When you know the relative age of a fossil what else do you know about it?
the relative age of the rock where it was found.
What types of dating estimates the age of a rock or fossil?
The rough estimating of the age of a fossil or rock containing fossils is called relative dating, and is based on the position of the rock or fossil in undisturbed sedimentary strata which contains what are called 'index fossils', fossils that only appear in specific geologic time periods.
How can index fossils be used to date rock?
Because if you know how old the fossil is, and you find the fossil inside a rock, you know that rock has a maxium age corresponding with the age of the fossil.
Definition of absolute dating?
age of a rock unit in number of years before present (numerical age).
If the relative age of a fossil is known what else is known?
The age of rock surrounding the fossil.
A fossil that is found in the rock layers of only one geologic age and that is used to establish the age of the rock layers?
An index fossil.
What is the true age of a rock or fossil?
The method used will be determined by the rock type, but the age of a rock will be determined by a determination of the amount of decay of a radioactive isotope, either contained in the rock, or in a geologic layer of rock coinciding with a fossil.
How the relative age of a fossil is determined by studying layers of rock?
It is determined because in layers of rocks the fossils are found so the layers of rocks give information to the scientist about the age of a fossil so like that the relative age of a fossil is determined.
What is the relative age of a fossil starfish?
the relative age of the rock where it was found.
What to methods are used to determine the age of a rock or fossil?
There are two methods used to determine the age of a rock or fossil. The first is carbon dating and the second is radiometric dating.
When you know the relative age of a fossil what else do you know about it?
the relative age of the rock where it was found.
How do sedimentary rock layers provide clues to a fossil age?
because fossils are in sedimentary rock
What is the definition of relative age?
The geologic age of fossil organisms, rock, or geologic features or events defined relative of each other.
