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What are index fossils and how are they used to determine the absolute age of sedimentary rocks?
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∙ 8y ago
Index fossils can be used to help determine the relative age of rock layers. Index fossils are from species that only existed for a short time. Index fossils are found in rock layers. Trilobites and Graptolites are index fossils.
Wilburn Weissnat
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What are index fossils used to determine?
time frames in geology
What must be true for a fossil organism to be useful as a index fossil?
The absolute age of the index fossil was determine by radioactive dating or another absolute method
What kind of rock layers did index fossil date?
index fossils are used to date the rock layers they are found incc
What do scientists use index fossils for?
Geologists use index fossils to define and identify geologic periods.
Fossil used to compare the relative ages of fossils?
index fossils
What are index fossils and how are they used to determine the absolute age of sedimentary rock?
Index fossils can be used to help determine the relative age of rock layers. Index fossils are from species that only existed for a short time. Index fossils are found in rock layers. Trilobites and Graptolites are index fossils.
What are index fossil and how are they used to determined the absolute age of sedimentary rock?
Index fossils can be used to help determine the relative age of rock layers. Index fossils are from species that only existed for a short time. Index fossils are found in rock layers. Trilobites and Graptolites are index fossils.
Do index fossils tell the relative or absolute age of fossils?
Index fossils can be used to help determine the relative age of rock layers. Index fossils are from species that only existed for a short time. Index fossils are found in rock layers. Trilobites and Graptolites are index fossils.
How can fossils be used to date rocks?
Geologists look for index fossils in the sedimentary rock to help determine its age. Index fossils are of organisms that were widespread and only existed during a specific slice of geologic time. Finding an index fossil in a rock means that the rock dates to that specific slice of time.
What are index fossils used to determine?
time frames in geology
How do trace fossils differ from index fossils?
Trace fossils are any evidences that an organism existed, including footprints, trails, burrows, chemical marker, and fossilized dung.Index fossils are those that are only found in a specific range of geologic time, and are used to quickly determine the age of a sedimentary rock sample.
____ fossils are used to determine in what time in the past events occured?
Index
How do fossils in sedimentary rock help interpret ancient environments?
the type of sedimentary rock determines when other layers in rocks formed and how they shifted. the properties of the species of time periods need certain environmental conditions. these conditions must be what types of environments ancient creatures lived in.
How do scientists determine history by using fossils and sedimentary layers?
Geologists and paleontologists look for index fossils in rock strata. These index fossils appear only in rocks of a certain age. Finding them lets the scientist know the approximate age range of a rock formation. Layers of sedimentary rock will also aid the scientist is determining the climate from that age, of any volcanism that may have taken place, the lifeforms that existed, and even find evidence of catastrophic events such as asteroid collisions that may have led to extinction events.
What must be true for a fossil organism to be useful as a index fossil?
The absolute age of the index fossil was determine by radioactive dating or another absolute method
What is examined to do relative dating?
The position of fossils in sedimentary rock layers.
What kind of rock layers did index fossil date?
index fossils are used to date the rock layers they are found incc
