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Study sets matching "fossils dating"

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Study sets matching "fossils dating"

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…
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…
20 terms
Dating Fossils
carbon film
Mold
Cast
Sedimentary rock
A type of fossil consisting of an extremely thin coating of c…
A fossil formed when an organism buried in sediment dissolves…
A solid copy of the shape of an organism.
A type of rock that forms when particles from other rocks or…
carbon film
A type of fossil consisting of an extremely thin coating of c…
Mold
A fossil formed when an organism buried in sediment dissolves…
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
13 terms
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
14 terms
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…
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…
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 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
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…
23 terms
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
12 terms
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…
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
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…
5 terms
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.…
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…
12 terms
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
35 terms
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…
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…
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
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.
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
30 terms
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…
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…
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,…
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
5 terms
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
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.
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.
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…
11 terms
fossil dates
anamensis
afarensis
africanus
aethiopicus
4.2-3.9
3.9-2.9
3.5-1.5
2.5-1.3
anamensis
4.2-3.9
afarensis
3.9-2.9
13 terms
Relative Dating and Fossil Record
paleontology
fossils
relative dating
absolute dating
the scientific study of fossils
Hardened remains or imprints of living things that existed lo…
deciding which is older or younger
measuring the age
paleontology
the scientific study of fossils
fossils
Hardened remains or imprints of living things that existed lo…
25 terms
Absolute Dating and Fossils
Paleontology
Trace fossils
Half-life
Absolute age
the branch of science concerned with fossil animals and plants.
provide us with indirect evidence of life in the past, such a…
The time it takes for half of the atoms in a radioactive elem…
The age of a rock given as the number of years since the rock…
Paleontology
the branch of science concerned with fossil animals and plants.
Trace fossils
provide us with indirect evidence of life in the past, such a…
25 terms
Absolute Dating and Fossils
Geologic process
Chemical composition
Erosion
Niagarafalls
Process that can be observed and measured over time
You can use this method for certain types of rocks
A process in whuch the materials of earth's surface are loose…
It is formed within the past 10000 to 20000 years
Geologic process
Process that can be observed and measured over time
Chemical composition
You can use this method for certain types of rocks
11 terms
fossil dates
bryophytes (spores of liverwurts)
aglaophyten (seedless)
ferns and allies (seedless)
seed plants
470 m.y.a
400 m.ya.
400 m.y.a
370 m.y.a
bryophytes (spores of liverwurts)
470 m.y.a
aglaophyten (seedless)
400 m.ya.
10 terms
Dating of Rocks/Fossils
Measured by comparing to age of rocks…
Fossils measured with radioactive decay.
Fossils used to compare to others to f…
All evidence of past life preserved in…
Relative Age
Absolute Age
Index Fossils
Fossil Record
Measured by comparing to age of rocks…
Relative Age
Fossils measured with radioactive decay.
Absolute Age
12 terms
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…
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
45 terms
Dating Rocks And Fossils Chapter 9
Geologic Time
Earth's Age
Fossils
Geologic Time Scale
Time In Terms Of History Of The Earth
4.54 Billion Years
Reconizable Remains Or Impressions Of An Organism In Rocks
Calender 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
13 terms
Dating of Rocks/Fossils
Measured by comparing age of rocks or…
Fossils measured with radioactive decay.
Fossils used to compare to others to f…
History of all organisms that have bee…
Relative Age
Absolute Age
Index Fossils
Fossil Record
Measured by comparing age of rocks or…
Relative Age
Fossils measured with radioactive decay.
Absolute Age
15 terms
Fossils, Rock Cycle, and Dating
3 types of rocks
igneous rock
sedimentary rock
metamorphic rock
igneous... metamorphic... sedimentary
rock made from cooled magma
formed by deposition, compaction and cementation of weathered…
rock that has been changed while under great heat and pressure
3 types of rocks
igneous... metamorphic... sedimentary
igneous rock
rock made from cooled magma
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
25 terms
Absolute Dating and Fossils quizlet
varve
radiometric dating
paleontology
trace fossil
a pair of thin layers of clay and silt of contrasting color a…
a method of dating geological or archeological specimens by d…
the branch of science concerned with fossil animals and plants.
a fossil of a footprint, trail, burrow, or other trace of an…
varve
a pair of thin layers of clay and silt of contrasting color a…
radiometric dating
a method of dating geological or archeological specimens by d…
30 terms
Fossils & Relative Dating
When a seashell is found on a mountain…
Is the object a fossil? If so what typ…
Is the object a fossil? If so what typ…
Is the object a fossil? If so what typ…
Was once under water
yes; original
no; not a fossil (artifact)
yes; cast
When a seashell is found on a mountain…
Was once under water
Is the object a fossil? If so what typ…
yes; original
10 terms
Relative Dating and Fossils Review
relative dating
superposition
geologic column
What are events that can disturb rock…
finding out if an object or event is older or younger than an…
a principle that states that younger rocks lie above older ro…
an ideal sequence of rock layers that contain all the known f…
faults, intrusions, folding and tilting
relative dating
finding out if an object or event is older or younger than an…
superposition
a principle that states that younger rocks lie above older ro…
10 terms
Relative Dating and Fossils Review
relative dating
superposition
geologic column
What are events that can disturb rock…
finding out if an object or event is older or younger than an…
a principle that states that younger rocks lie above older ro…
an ideal sequence of rock layers that contain all the known f…
faults, intrusions, folding and tilting
relative dating
finding out if an object or event is older or younger than an…
superposition
a principle that states that younger rocks lie above older ro…
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