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The U.S. Geological Survey states that it is possible to use Carbon radiometric dating for sedimentary rock younger than 50, years by dating once living material from the sediment. However, the relatively short half-life of approximately 5, years makes it inappropriate for older samples. For dating older materials, . 23 Mar Sedimentary rocks may have radioactive elements in them, but they have been re -worked from other rocks, so essentially, there radiometric clock has not been re- set back to zero. However, sedimentary rocks can be age dated if a volcanic ash horizon or a diabase sill or dyke can be found within the. Sedimentary rock is composed of the weathered remains of a variety of rocks of all ages. It would therefore only be possible to date specific components of a sample, none of which would equate to the age of the sedimentary rock as a unit. Sedimentary rock is dated by its association in the geologic column with igneous and.

According to the Smithsonian Institute, using radiodating of sedimentary rock tells the date of formation of the original igneous rock, which, through the processes of weathering and erosion, formed the layers of the sedimentary rock.

Radiodating determines the maximum age of sedimentary rock. If a layer of igneous rock forms on top of the sedimentary rock, scientists determine an age bracket for the rock sample, but not an absolute age. Geological Survey states that it is possible to use Carbon radiometric dating for sedimentary rock younger than 50, years by dating once living material from the sediment. However, the relatively short half-life of approximately 5, years makes it inappropriate for older samples.

For dating older materials, scientists use isotopes of other elements, some of which have a half-life of billion years. According to the Utah Geological Survey, nuclear decay of radioactive elements works like a clock in allowing scientists to determine an absolute age.

During radioactive decay, the parent isotope transforms into a stable daughter isotope. The rates at which radioactive decay occur are constant and measurable using the isotope's half-life.

Is there a definite link between birds and dinosaurs? Because the elements used for dating need to be re-set by volcanism. The most widely known form of radiometric dating is carbon dating.

The half-life of a radioactive element is the time required for half the isotope to decay to form the stable daughter isotope. Why can't most sedimentary rocks be dated radiometrically?

Why can't most sedimentary rocks be dated radiometrically?

Quick Answer According to the Smithsonian Institute, using radiodating of sedimentary rock tells the date of formation of the original igneous rock, which, through the processes of weathering and erosion, formed the layers of the sedimentary rock.

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What is terrigenous sediment? What types of rock make up Mt. Full Answer The U. Learn more about Geology Sources:. What is the principle of original horizontality? The principle of original horizontality refers to an assumption by geologists that all layers of sedimentary rock were horizontal when they were formed.

Trending questions How do you calculate freezing point depression? What is a metaphor, simile, hyperbole, irony, alliteration, and imagery? Write a one sentence answer Unfortunately, these elements don't exist in dinosaur fossils themselves.

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Why Cant Radioactive Dating Be Used To Date Sedimentary Rocks

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