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How do sedimentary rock layers provide clues to a fossil age?
because fossils are in sedimentary rock
Why is it difficult to dtermine the absolute age of a sedimentary rock?
In most cases, all we have to date are the clasts in the sedimentary rock. Dating the clasts, however, would yield the age of the source rock from which they were derived rather than the current sedimentary rock.
What The age of something compared with the age of another thing is the?
reative age
What is the age of something compared with the age of another thing?
reative age
What do Geologists use radiometric dating to date sedimentary rock?
Geologists use radiometric dating of volcanic ash layers within sedimentary rock to determine the age of the sedimentary rock. By dating the igneous rock layers above and below the sedimentary rock, geologists can establish a bracket of time within which the sedimentary rock was deposited.
How do scientists use sedimentary rock to determine a fossils relative age?
Scientists can use sedimentary rock to determine a fossil's relative age by examining the layers in which the fossil is found. The principle of superposition states that in an undisturbed sequence of sedimentary rock layers, the oldest layer is at the bottom and the youngest layer is at the top. By identifying the layer in which the fossil is located, scientists can approximate its relative age compared to other fossils and rock layers.
Is it true to say that radioactive istopes in clastic sedimentary rocks always predict an age that is younger than the sedimentary rock?
No, radioactive isotopes in clastic sedimentary rocks can provide ages that are younger, older, or similar to the actual age of the rock. The key is to select an appropriate radioactive isotope with a suitable half-life that aligns with the age range of the sedimentary rock being studied.
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
Explain the relationship between the age of minerals within a clastic sedimentary rock and the timing of the rock's formation?
Since the rock particles, or clasts, that go into the making of a clastic sedimentary rock are weathered and eroded out of a previous rock formation, logically, they would be older than the cementious material that holds together the newly formed clastic sedimentary rock. Visualize a piece of San Onofre breccia, a sedimentary breccia rock which contains volcanic basalts, metamorphic schists, and other rocks, all cemented together as a sedimentary rock. The pieces of the rock are all from previously formed and eroded rocks. Although the sedimentary rock is fairly new, geologically speaking, the rock parts that make it up are much older.
What is the The age of an intrusion of igneous rock in relation to the sedimentary rock layers through which it passes?
It is younger.
What is the age of an intrusion of igneous rock in relation to the sedimentary rock layers through which it passed?
It is younger.
Why is it difficult to determine the absolute age of a rock?
It is difficult to determine the absolute age of a sedimentary rock because sedimentary rocks are made up of diverse particles that are all different ages. As a result radioactive dating can only determine the age of the particles, not the whole rock.
