Study sets matching "fossils dating"

Study sets
Classes
Users

Study sets matching "fossils dating"

22 terms
Dating/ Fossils
absolute dating
relative dating
isotope
radioactive decay
any method of measuring the age of an event or objects in years
putting a series of events or objects, such as rock layers in…
an atom that has the same number of protons(atomic number) as…
an unstable isotope breaking down into a stable isotope of th…
absolute dating
any method of measuring the age of an event or objects in years
relative dating
putting a series of events or objects, such as rock layers in…
23 terms
Fossils and Dating
law of superposition
absolute age
radiometric dating
geologic time scale
the oldest layer of rock is on the bottom
the age of igneous rock layers determined by radiometric dating
dating process that depends upon radioactive decay
history of the earth from the physical origin to today
law of superposition
the oldest layer of rock is on the bottom
absolute age
the age of igneous rock layers determined by radiometric dating
Fossils And Dating
uniformitarianism
fossils
trace fossil
climate
the principle that states that geologic processes that happen…
the trace or remains of an organism that lived long ago, most…
a fossilized structure that formed in sedimentary rock by ani…
the weather conditions in the area over a long period of time
uniformitarianism
the principle that states that geologic processes that happen…
fossils
the trace or remains of an organism that lived long ago, most…
38 terms
dating and fossils
geological time
earth's age
fossils
geologic time scale
time in terms of history of the earth
4.54 billion years
recognizable remains or impressions of an organism in rocks
calendar of earth's history over a very long time
geological time
time in terms of history of the earth
earth's age
4.54 billion years
8 terms
Dating Fossils
Chonostratigraphy
Strata
Law of Superposition
Fossil Dating
Science determining the age of rock strata in relation to time
Layers of deposition that provide age references within the e…
States that the relative age of layers of strata goes from ol…
Determining the age of a fossil sample
Chonostratigraphy
Science determining the age of rock strata in relation to time
Strata
Layers of deposition that provide age references within the e…
5 terms
Dating fossils
Unconformity
Radioactive dating
Intrusions
law of superposition
Incomplete or missing layer of rock
A way of calculating the age of a rock by measuring the ratio…
rock formed from magma that cools and solidifies within the c…
in undisturbed layer of rock, the oldest rocks are on the bot…
Unconformity
Incomplete or missing layer of rock
Radioactive dating
A way of calculating the age of a rock by measuring the ratio…
5 terms
Dating Fossils
Unconformity
Radioactive dating
Intrusions
Law of superpositions
Incomplete of missing layer of rock
A way of calculating the age of a rock by measuring the ratio…
rock formed from the magma that cools and solidifies within t…
in undisturbed layer of rock, the oldest rocks are on the bot…
Unconformity
Incomplete of missing layer of rock
Radioactive dating
A way of calculating the age of a rock by measuring the ratio…
Dating fossils
law of superposition
extrusions
intrusions
unconformity
in undisturbed layer of rock the oldest rocks are on the bott…
sometimes magma can force itself through a crack or fault in…
rock formed from magma that cools and solidifies within the c…
incomplete or missing layer of rock
law of superposition
in undisturbed layer of rock the oldest rocks are on the bott…
extrusions
sometimes magma can force itself through a crack or fault in…
21 terms
Dating/Fossils
Index fossil criteria
Index fossil definition
4 Main Types of fossils
Unaltered fossil definition
Appears over a wide geographical space, appears for a short t…
A particular fossil that is used to identify a specific time…
Petrified, carbonised, trace and unaltered
A whole fossilised organism
Index fossil criteria
Appears over a wide geographical space, appears for a short t…
Index fossil definition
A particular fossil that is used to identify a specific time…
9 terms
Dating fossils
Relative age
Law of superposition
Uncomformity (squiggly line)
Absolute age
Age of a rock or fossil compared to another rock or fossil
States that each rock layer is older than the rock layer abov…
Indicates where there is a missing strata (layer)
Specific age of a rock or fossil
Relative age
Age of a rock or fossil compared to another rock or fossil
Law of superposition
States that each rock layer is older than the rock layer abov…
12 terms
Dating Fossils
radiometric dating
Law of Superposition
Original horizontality
cross-cutting relationships
uses radioactive isotopes that decay over time
layers are arranged in a sequence with oldest on bottom and y…
flat layer deposits
events are younger than the layers they cut
radiometric dating
uses radioactive isotopes that decay over time
Law of Superposition
layers are arranged in a sequence with oldest on bottom and y…
Dating Fossils
Dendrochronology
Unconformity
Evolution
Period
Science of comparing annual growth rings in trees to date eve…
Gap in the rock record caused by erosion or weathering
Adaptation of life-forms to changing environmental changes
Third longest time unit in geologic time scale (tens of milli…
Dendrochronology
Science of comparing annual growth rings in trees to date eve…
Unconformity
Gap in the rock record caused by erosion or weathering
6 terms
Dating Fossils
How old is Earth?
Part of the atom that is in the nucleu…
An atom of an element with a different…
Fossil record tells us multiple ties o…
4.5 billion years old
Neutron
Isotobe
Mass Extinction
How old is Earth?
4.5 billion years old
Part of the atom that is in the nucleu…
Neutron
31 terms
Dating Fossils
Fossils
Why are fossil records incomplete?... Ex…
What must be avail for fossils to form…
Moist areas, like forested areas, that…
solidified remains or traces of once living organisms found i…
soft tissues of organisms do not fossilize and so there is no…
Special environmental conditions must be available for fossil…
Produce a fossil record
Fossils
solidified remains or traces of once living organisms found i…
Why are fossil records incomplete?... Ex…
soft tissues of organisms do not fossilize and so there is no…
Fossils and Dating
Fossils
Requirements for a fossil
Trace fossil
Original remain
Are the remains, imprints, or traces of prehistoric organisms…
once living or part of something. It also has to have hard pa…
these are details preserved in rocks that are indirect eviden…
occurs when freezing, drying and encasement, such as in tar o…
Fossils
Are the remains, imprints, or traces of prehistoric organisms…
Requirements for a fossil
once living or part of something. It also has to have hard pa…
Fossils and Dating
Radiometric Dating
Isotope
Half-life
Half life of Radiocarbon
Uses decay of radioactive isotopes to determine age
Atom of the same element that have the same number of protons…
Time it takes for half the parent material to decay the daugh…
5,700 years
Radiometric Dating
Uses decay of radioactive isotopes to determine age
Isotope
Atom of the same element that have the same number of protons…
Fossils and Dating
Absolute age
Carbonaceous film
Cast fossil
Extinct
The age of a rock, expressed in units of time, such as years
Fossilized organism's tissue contains carbon
Organism's hard parts fall into soft sediments
A species or organism group that is no longer in existence
Absolute age
The age of a rock, expressed in units of time, such as years
Carbonaceous film
Fossilized organism's tissue contains carbon
6 terms
dating of fossils
embryology
anatomy
homologous
analogous structure
study of development of organism
stud of organs and other body structures
structure that resembles each other but have different struct…
same function diff. structure
embryology
study of development of organism
anatomy
stud of organs and other body structures
Fossils and dating
Law of superposition
Principles of Crosscutting Relationships
Principle of Lateral Continuity
Unconformities
in undisturbed rock layers the oldest layers are the ones on…
a fault or intrusion that cuts through rock layers is younger…
sedimentary rock layers form in flat, horizontal layers that…
regions in the rock record where erosion or some other force…
Law of superposition
in undisturbed rock layers the oldest layers are the ones on…
Principles of Crosscutting Relationships
a fault or intrusion that cuts through rock layers is younger…
Fossils and Dating
Law Of Superposition
Absolute Age
Radiometric Dating
Geologic Time Scale
The oldest layer of rock is on the bottom.
The age of igneous rock layers determined by radiometric dati…
Dating process that depends upon radioactive decay.
History of the Earth from the physical origin to today.
Law Of Superposition
The oldest layer of rock is on the bottom.
Absolute Age
The age of igneous rock layers determined by radiometric dati…
23 terms
Fossils and Dating
Law of Superposition
Absolute age
Radiometric dating
Geologic time scale
The oldest layer of rock is on the bottom
The age of igneous rock layers determined by radiometric dating
Dating process that depends upon radioactive decay
History of the Earth from the physical origin to today
Law of Superposition
The oldest layer of rock is on the bottom
Absolute age
The age of igneous rock layers determined by radiometric dating
fossils and dating
Law of superposition
absolute age
radiometric dating
geologic time scale
the oldest layer of rock is on the bottom
the age of igneous rock layers determined by radiometric dating
dating process that depends upon radioactive decay
history of the earth from the physical origin to today
Law of superposition
the oldest layer of rock is on the bottom
absolute age
the age of igneous rock layers determined by radiometric dating
Fossils and Dating
List and describe different fossils
What are the three types of preserved…
What is the difference between relativ…
What type of rock do fossils usualy form
Mold, cast, petriffied fossils, trace fossils (along with the…
Orgnisms can be preserved with littlemor no change... Being trap…
Relative aging tells you the age of a rock or a fossil. Absou…
Sedimentary
List and describe different fossils
Mold, cast, petriffied fossils, trace fossils (along with the…
What are the three types of preserved…
Orgnisms can be preserved with littlemor no change... Being trap…
18 terms
Fossils and Relative Dating
What are fossils?
Where are fossils usually found?
Petrified fossils are...
A mold fossil is...
Preserved remains or traces of living things.
In sedimentary rocks.
fossils in which minerals replace all or part of the organism.
a hollow area in sediment in the shape of an organism or part…
What are fossils?
Preserved remains or traces of living things.
Where are fossils usually found?
In sedimentary rocks.
21 terms
Dating and Fossils
Fossil
Unaltered remain
Altered remain
Mold
Any remains of plants or animals that have been left behind p…
The organism has become a fossil but it has not been changed…
The organism has undergone a change and become mineralized (p…
The hollow area left behind when the soft parts of the organi…
Fossil
Any remains of plants or animals that have been left behind p…
Unaltered remain
The organism has become a fossil but it has not been changed…
18 terms
Fossils and Relative Dating
What are fossils?
Where are fossils usually found?
Petrified fossils are...
A mold fossil is...
Preserved remains or traces of living things.
In sedimentary rocks.
fossils in which minerals replace all or part of the organism.
a hollow area in sediment in the shape of an organism or part…
What are fossils?
Preserved remains or traces of living things.
Where are fossils usually found?
In sedimentary rocks.
Fossil and Dating
Geologic time scale
Law of superposition
Relative Age
Absolute Age
A record of the geologic events and life forms in Earth's his…
The geologic principle that states that in horizontal layers…
The age of rock compared to the ages of the rock layers above…
The age of rock given as the number of years since the rock f…
Geologic time scale
A record of the geologic events and life forms in Earth's his…
Law of superposition
The geologic principle that states that in horizontal layers…
19 terms
Dating of Rocks/Fossils
Measured by comparing age of rocks or…
Fossils measured with radioactive deca…
Fossils used to compare to others to f…
All organisms that have been found on…
Relative Age
Absolute Age
Index Fossils
Fossil Record
Measured by comparing age of rocks or…
Relative Age
Fossils measured with radioactive deca…
Absolute Age
9 terms
Dating Fossils
Relative Dating
Stratigraphy
Fossils in a Rock Profile
Rock Profile Theory
Tells which fossil is oldest, order from oldest to youngest,…
Study of layers of strata in sedimentary rock
Sedimentary rock ranged in order deposited and allow to arran…
Assumes top layers younger layers contain same type index fos…
Relative Dating
Tells which fossil is oldest, order from oldest to youngest,…
Stratigraphy
Study of layers of strata in sedimentary rock
Dating Fossils
How do scientists use half-life to det…
What is the half-life of C-14 and what…
What is radioactive dating?
What is relative dating?
They use unstable isotopes found in a fossil, and study the a…
The half-life of C-14 is 5730 years, and it decays into N-14.…
Calculating the age of a sample based on the remaining radioa…
Using the fossil's position in rock to determine the date of…
How do scientists use half-life to det…
They use unstable isotopes found in a fossil, and study the a…
What is the half-life of C-14 and what…
The half-life of C-14 is 5730 years, and it decays into N-14.…
Relative Dating and Fossils
Relative Dating
Law of superposition
- Unconformities ... - Faults... - Intrusion…
Intrusions
Finding out whether an object is younger or older than anothe…
Younger rocks lie above older rocks in undisturbed sequences.
Types of Disturbances?
_______________ are ALWAYS YOUNGER than the rock they CUT thr…
Relative Dating
Finding out whether an object is younger or older than anothe…
Law of superposition
Younger rocks lie above older rocks in undisturbed sequences.
25 terms
Fossils and Dating Methods
How old is the Earth?
Name the process that causes tectonic…
What are the three geological eras tha…
To which geological era was the first…
4.6 billion years
Mantle convection
Paleozoic... Mesozoic... Cenozoic
Paleozoic
How old is the Earth?
4.6 billion years
Name the process that causes tectonic…
Mantle convection
30 terms
Relative Dating and Fossils
Petrified Fossil
Mold
Cast
Carbon Film
The fossil type in which an organism becomes replaced by mine…
The fossil type that is a hollow space in the shape of the or…
A solid stone copy of an organism
A fossil that is a thin layer of carbon left
Petrified Fossil
The fossil type in which an organism becomes replaced by mine…
Mold
The fossil type that is a hollow space in the shape of the or…
15 terms
WPSD Dating Fossils
mold & cast
encasement (actual remains)
petrify (v)/petrification (n)
index fossil
Space left in rock/mud that is the shape of an organism; mine…
fossil of an organism surrounded by / preserved in tar, moss,…
replacement of the original cells of an organism with minerals
Fossil of an organism that lived across a wide area for a sho…
mold & cast
Space left in rock/mud that is the shape of an organism; mine…
encasement (actual remains)
fossil of an organism surrounded by / preserved in tar, moss,…
28 terms
Fossils and Rock Dating
Fossils
Petrified remains
Carbonization and Carbon Films
Preserved remains
Remains or traces of once living organisms
Minerals replace all or part of an organism
Occurs when only the carbon remains in a specimen. Other mine…
Occurs when the entire remains of organism are preserved in a…
Fossils
Remains or traces of once living organisms
Petrified remains
Minerals replace all or part of an organism
15 terms
Fossils/Relative Dating
fossils
two conditions needed for fossil forma…
paleontologists
permineralized remains
the remains, imprints, or traces of prehistoric organisms
1. bury the organism quickly... 2. if the organism contains hard…
scientists who study fossils
fossils in which the spaces inside are filled with minerals f…
fossils
the remains, imprints, or traces of prehistoric organisms
two conditions needed for fossil forma…
1. bury the organism quickly... 2. if the organism contains hard…
Fossil Dating
Fissure Track Dating
Ice Core Dating
Optical Stimulated Luminescence
Carbon-14
counts the tracks on crystals on living and non-living items
cylinders of ice drilled out of glaciers and polar ice sheets
age geological mineral samples,causes items to glow in the dark
determination of age or date of an organic matter form the re…
Fissure Track Dating
counts the tracks on crystals on living and non-living items
Ice Core Dating
cylinders of ice drilled out of glaciers and polar ice sheets
14 terms
Fossil and Dating
fossil
relative dating
absolute dating
isotope
the remains of an organism that is preserved in something.
finding the estimated age using other rocks around it.
finding the exact age of something.
forms of the same element containing different amounts of neu…
fossil
the remains of an organism that is preserved in something.
relative dating
finding the estimated age using other rocks around it.
Fossil dating
Principles
Superposition
Cross cutting
Metamorphic
Superpostion, cross cutting, metamorphic, and inclusion
Older layers at the bottom (relative dating)
Igneous layers that cut through rock layers are newer than th…
Metamorphic rock that has been completely changed
Principles
Superpostion, cross cutting, metamorphic, and inclusion
Superposition
Older layers at the bottom (relative dating)
49 terms
DATING ROCKS AND FOSSILS BY SOMEONE76
Geological Time
Earth's Age
Fossils
Geologic Time Scale
A record of the life forms and geological events in Earth's h…
4.54 billion years old
The preserved remains or traces of organisms that once lived…
A record of the geologic events and life forms in Earth's his…
Geological Time
A record of the life forms and geological events in Earth's h…
Earth's Age
4.54 billion years old
Dating Rocks and Fossils
Geologic time
Earth's Age
Fossils
Geologic Time Scale
time in terms of history of the Earth
4.54 billion years
recognizable remains or impression of a organism in rocks
calendar of Earth's history over a very long time
Geologic time
time in terms of history of the Earth
Earth's Age
4.54 billion years
9 terms
Fossil Dating
Angular
Disconformity
Nonconformity
Earth has been around for about how lo…
Titled layers overlain by horizontal layers.
Horizontal layers interrupted by erosion.
Sedimentary rocks deposited over igneous rocks.
4.6 Billion Years
Angular
Titled layers overlain by horizontal layers.
Disconformity
Horizontal layers interrupted by erosion.
29 terms
Geological Time Scale, Fossils, Dating
geology
fossils
sedimentary
body fossils, trace fossils
What is the study of Earth's layers and materials?
What are preserved remains or traces of an organism that live…
What rock type can we more likely find fossils?
What are the two main types of fossils?
geology
What is the study of Earth's layers and materials?
fossils
What are preserved remains or traces of an organism that live…
Fossil dating
Taphonomy
Stratigraphy
Principle of superposition
Provenience
study of what happens to the remains of an animal from the ti…
The study of the order of rock layers and the sequence of eve…
older layers are laid down first and then covered by younger…
The origin or original source from which the fossil came.
Taphonomy
study of what happens to the remains of an animal from the ti…
Stratigraphy
The study of the order of rock layers and the sequence of eve…
Dating of Rocks/Fossils
Measured by comparing age of rocks or…
Fossils measured with radioactive deca…
Fossils used to compare to others to f…
All organisms that have been found on…
Relative Age
Absolute Age
Index Fossils
Fossil Record
Measured by comparing age of rocks or…
Relative Age
Fossils measured with radioactive deca…
Absolute Age
15 terms
Relative Dating & Index Fossils
Relative Dating
Index Fossil
Taxonomy
Classification
method of determining the age of a fossil by comparing its pl…
distinctive fossil, which lived during a short period of time…
practice of classifying plants and animals according to their…
the division of organisms into a hierarchal series of groups
Relative Dating
method of determining the age of a fossil by comparing its pl…
Index Fossil
distinctive fossil, which lived during a short period of time…
Relative Dating, Fossils, Radiometric Dating
What is Uniformitarianism?
What is Relative dating?
What is Law of superposition?
What is the principle of original hori…
the concept that processes that have shaped Earth in the past…
process by which rocks are placed in chronological order from…
law that states that in any undeformed sequence of sedimentar…
layers of sediments are generally deposited in horizontal or…
What is Uniformitarianism?
the concept that processes that have shaped Earth in the past…
What is Relative dating?
process by which rocks are placed in chronological order from…
20 terms
Dating Rocks and Fossils
Geologic Time
Earth's Age
Fossils
Geologic Time Scale
time in terms of history of the Earth
4.54 billion years
recognizable remains or impressions of an organism in rocks
calendar o f Earth's history over a very long time
Geologic Time
time in terms of history of the Earth
Earth's Age
4.54 billion years
Fossils and Absolute Dating
decomposition
original preservation
3 ways fossils are preserved
dessication
this is necessary so that the Earth doesn't get covered in de…
rare cases where the complete organism is preserved including…
Freezing, dessication, and in amber
a process that preserves an organism when it dries out, usual…
decomposition
this is necessary so that the Earth doesn't get covered in de…
original preservation
rare cases where the complete organism is preserved including…
12 terms
relative dating and fossils
the law of superposition
the cross cutting law
the law of inclusion
unconformity
older rock layers are deeper
the cut is newer than everything it goes through
if a rock contains fragments, the chunks are older than the s…
a missing layer indicating something was eroded (shown as a w…
the law of superposition
older rock layers are deeper
the cross cutting law
the cut is newer than everything it goes through
1 of 10