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Most sedimentary rocks are readily dated by radiometric methods True False?
False. Most sedimentary rocks cannot be directly dated by radiometric methods because they are composed of sediments that were already eroded and transported from existing rocks. Instead, geologists use relative dating techniques to determine the sequence of events in which sedimentary rocks were formed.
Sedimentary rocks can't be dated?
Sedimentary rocks cannot be given an absolute date by radiometric testing, but they can be given an estimated date from a few geological laws, for example if a bed of desert sandstone ins under a bed of limestone there is a law that says that the sandstone is older.
Can you find the absolute age of sedimentary rock layers?
Sometimes. The sediments themselves cannot be dated by radiometric methods, because the radiometric dates will reflect the original formation of the rocks from which the sediments were derived. But the sedimentary rocks may contain datable material, such a fossils of a characteristic form, or there may be a datable layer of volcanic material above or between sedimentary layers. Also, it is sometimes possible to determine the age of rocks by comparing the alignment of magnetic mineral grains within them with the history of magnetic pole reversals.
True or False To find the specific age of rocks scientist cannot use radiometric dating?
False. Radiometric dating is a common method used by scientists to determine the age of rocks. By measuring the ratio of radioactive isotopes to stable isotopes in a rock sample, scientists can calculate how long ago the rock formed.
Can use radiometric dating on all minerals to tell their absolute age?
You can't date all minerals using the radiometric dating method because not all minerals have radioactive isotopes. In addition, the parent and daughter isotopes must remain together in a rock to use them to determine the rock's age. Because sedimentary rocks contain fragments of many rocks that could be different ages, radiometric dating is less useful for dating sedimentary rock. This technique is primarily used to date igneous rocks.
Which type of rock cannot become another type of rock?
Sedimentary rocks cannot become metamorphic rocks or igneous rocks directly; however, they can transform into metamorphic rocks under heat and pressure. The process of sedimentary rock formation involves the accumulation of particles and organic material, which means that while they can change forms, they cannot become igneous rocks without first being melted into magma. Thus, while sedimentary rocks can change into metamorphic forms, they do not directly transition into igneous rocks.
What is considered when measuring kinetic energy?
Kinetic energy cannot be measured directly, but the kinetic energy is just 1/2 times the mass times the velocity squared, and velocity can be measured directly.
What can radiometric dating tell us about the age of rock that law of superposition cannot?
Radiometric dating can give us the absolute age of the rock. Trace fossils and the Law of Superposition can only provide the relative age of the rock. Radiometric dating is far more specific in formation analysis.
Can basalt turn into shale?
No, basalt cannot turn into shale. Basalt is an igneous rock formed from the cooling of lava, while shale is a sedimentary rock formed from the compaction of clay or mud. The processes that form these two types of rocks are different, so basalt cannot directly change into shale.
Why oxygen cannot be determined directly by combustion analysis?
Oxygen cannot be determined directly by combustion analysis because it is an essential part of the combustion process. When a compound containing oxygen is combusted, the oxygen is already being consumed and cannot be measured separately in the analysis. Instead, oxygen content is usually calculated indirectly by difference after measuring the amounts of other elements present.
What type of rocks cannot turn into sedimentary rocks?
No rock. Any rock can turn into sedimentary rock, such as granite (igneous rock) and slate (metamorphic rock). Even sedimentary rock can turn into other sedimentary rock.
Is there a pathway through the rock cycle in which magma becomes sedimentary rock?
Yes, when igneous rock (magma) has solidified and then gets subsequently eroded, the eroded particules can get blown or washed into rivers for example, and then can form sedimentary rocks further down the chain.
