0
Want this question answered?
Be notified when an answer is posted
Add your answer:
Earn +20 pts
A fossil that is used to date surrounding rock layers is?
This is called an index fossil.
What is a fossil used to date surrounding rock layers called?
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 is the difference between trace fossil and index fossil?
A trace fossil is one that merely indicates that an organism left evidence of its existence. Some examples would be burrows or footprints that appear in sedimentary rock. An index fossil is of an organism that dates to a particular time in the geologic record, the organism only appearing in a certain segment of that record. Index fossils are indicators of the age of the rock in which they are found.
Remains of plants or animals used to correlate rock layers over large geographic areas?
index fossil
A fossil that is used to date surrounding rock layers is?
This is called an index fossil.
What is a fossil used to date surrounding rock layers called?
Index fossils.
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.
What kind of rock layers did index fossil date?
index fossils are used to date the rock layers they are found incc
What is the fossil called that geologists use to determine rock ages?
Index Fossil
Which New York State index fossil may have been present in a rock layer that is missing due to the unconformity?
The trilobite is the index fossil
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.
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.
Would horseshoe crabs be useful as an index fossils?
No, Index fossils are used to date certain rock layers where the fossil is found. So it's usefull when you can find a certain index fossil only in a small period of time. So you can get the most precise dating for the rock layer. Horseshoe crabs are known as a 'living fossil', the first fossils of horse shoe crabs are found 450 millions years ago. So when you find a fossil of a horse shoe crab in a rock or sediment, you can't say anything about the age of the rock.
What is the difference between trace fossil and index fossil?
A trace fossil is one that merely indicates that an organism left evidence of its existence. Some examples would be burrows or footprints that appear in sedimentary rock. An index fossil is of an organism that dates to a particular time in the geologic record, the organism only appearing in a certain segment of that record. Index fossils are indicators of the age of the rock in which they are found.
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.
What is a bioclast?
A bioclast is a fossil fragment which is used to date a rock stratum.
