A break that separates older metamorphic rocks form younger sedimentary rocks immediately above them is a type of unconformity called an
🔄 Click to see definition
Definition1/12
a nonconformity
🔄 Click to see term
Term1/12
A potassium 40 sample starts with 50 atoms and 1.25 billion years later there are 25 atoms What is the half life of potassium 40
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Definition1/12
1.25 billion years: 25/50 or half the original atoms have
disintegrated in 1.25 billion years, and that is the definition of
half life.
🔄 Click to see term
Term1/12
What is the name of the doctrine that states the physical chemical and biological laws that operate today have also operated in the geologic past
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Definition1/12
Uniformitarianism
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Term1/12
Which type of geologic event has to occur to create an angular unconformity
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Definition1/12
The folding or tilting of rocks, followed by renewed deposition,
has to occur to create an angular unconformity.
🔄 Click to see term
Term1/12
How do you use lava to learn about the ages of sedimentary rock
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Definition1/12
It is fairly easy to determine the age of lava or volcanic ash
using radiometric dating, but much harder with sedimentary rock.
But, if a layer of sedimentary rock is in between two layers of
volcanic rock, then we know if had to have formed after the first
layer and before the second one. If we know how old the volcanic
layers are, then we have a general idea of how old the sedimentary
layer is as well.
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Term1/12
What does the radiometric date of metamorphic rock most likely represent
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Definition1/12
heated during metamorphism
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Term1/12
Which item could be dated using radiocarbon dating
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Definition1/12
A 60,000 year old mammoth bone.
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Term1/12
The boundaries of history of eras are marked by great worldwide changes in
🔄 Click to see definition
Definition1/12
The boundaries of history of eras are marked by great worldwide
changes in continental coastline
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Term1/12
Which artifact could best be dated with carbon-14 a method called radiocarbon dating
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Definition1/12
A fragment of a turtle shell that likely is 10,000 to 30,000
years old
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Term1/12
What limits the usefulness of radiocarbon dating in studying Earth's history
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Definition1/12
The relatively short half-life of carbon-14, which is 5,730
years
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Term1/12
Which dating method enables scientists to measure or estimate the absolute age of sedimentary rock
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Definition1/12
Radiometric dating of igneous rocks that relate to the
sedimentary rock
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Term1/12
The boundaries of eras are marked by great worldwide changes in
🔄 Click to see definition
Definition1/12
Lifeforms.
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Cards in this guide (12)
A break that separates older metamorphic rocks form younger sedimentary rocks immediately above them is a type of unconformity called an
a nonconformity
A potassium 40 sample starts with 50 atoms and 1.25 billion years later there are 25 atoms What is the half life of potassium 40
1.25 billion years: 25/50 or half the original atoms have
disintegrated in 1.25 billion years, and that is the definition of
half life.
What is the name of the doctrine that states the physical chemical and biological laws that operate today have also operated in the geologic past
Uniformitarianism
Which type of geologic event has to occur to create an angular unconformity
The folding or tilting of rocks, followed by renewed deposition,
has to occur to create an angular unconformity.
How do you use lava to learn about the ages of sedimentary rock
It is fairly easy to determine the age of lava or volcanic ash
using radiometric dating, but much harder with sedimentary rock.
But, if a layer of sedimentary rock is in between two layers of
volcanic rock, then we know if had to have formed after the first
layer and before the second one. If we know how old the volcanic
layers are, then we have a general idea of how old the sedimentary
layer is as well.
What does the radiometric date of metamorphic rock most likely represent
heated during metamorphism
Which item could be dated using radiocarbon dating
A 60,000 year old mammoth bone.
The boundaries of history of eras are marked by great worldwide changes in
The boundaries of history of eras are marked by great worldwide
changes in continental coastline
Which artifact could best be dated with carbon-14 a method called radiocarbon dating
A fragment of a turtle shell that likely is 10,000 to 30,000
years old
What limits the usefulness of radiocarbon dating in studying Earth's history
The relatively short half-life of carbon-14, which is 5,730
years
Which dating method enables scientists to measure or estimate the absolute age of sedimentary rock
Radiometric dating of igneous rocks that relate to the
sedimentary rock
The boundaries of eras are marked by great worldwide changes in