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No, if you use radiometric dating techniques on sedimentary rocks you will find the age of formation of the constituent grains which will originally have been weathered and eroded from a source or parent rock and as such the age of the grains is potentially much larger than the age of the sedimentary rock that they have since been deposited to form.
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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.
By applying the law of superposition what dates can be determined?
By applying the law of superposition, the relative ages of sedimentary rocks can be determined. This allows geologists to arrange rock layers in chronological order, with the oldest layers at the bottom and the youngest layers at the top. Absolute dates (specific numerical ages) cannot be determined solely through the law of superposition.
To date a sedimentary rock layer between two igneous rock units geologists use radiometric dating and assume that the sedimentary layers are?
Geologists use radiometric dating of the igneous rock units above and below the sedimentary layer to establish a time range for the sedimentary rock. They assume that the sedimentary layers are younger than the underlying igneous rock and older than the overlying igneous rock, based on the principle of superposition. This allows them to estimate the age of the sedimentary layer by determining the ages of the surrounding igneous rocks.
How did geologists estimate the aging of rock layers before radioactivity?
The rock layers were simply assigned geologic period classifications based on index fossils. Little was know about the true age of the rock, only that they were quite old based on the appearance of the fossils compared to existing organisms, and the knowledge that sedimentary rock formation usually took great lengths of time, and that layers of sediments were mostly cyclical in nature.
What two types of ages of rocks that geologists talk about?
Geologists talk about relative ages and absolute ages of rocks. Relative ages are determined by the order of rock layers, with younger layers on top and older layers at the bottom. Absolute ages are determined through radiometric dating methods to provide a specific age in years for a rock sample.
What evidence would a scientists use to determine the absolute age of a fossil found in sedimentary rock?
The Igneous intrusions and extrusions near sedimentary layers.
Why are sedimentary rocks so important for understanding the history of the Earth?
Through observation of sedimentary rocks, geologists are able to analyze rock layers and date the rocks by testing the carbon in each sample.
What type of rock is most useful historical geologists?
Sedimentary rocks are most useful for historical geologists because they can contain fossils and provide information about past environments and the Earth's history. Sedimentary rocks also often preserve layers that can be used to determine the relative age of rock formations.
What is the theory of sedimntary rock layers tend to be younger and than the layers below them is called?
The theory that sedimentary rock layers are generally younger than the layers beneath them is known as the Law of Superposition. This geological principle states that in an undeformed sequence of sedimentary rocks, the oldest layers are at the bottom and the younger layers are at the top. This ordering helps geologists determine the relative ages of rock formations and the fossils they contain.
Why are sedimentary rocks important to relative dating?
Sedimentary rocks are important for relative dating because they are formed in layers over time, with the oldest layers at the bottom and the youngest at the top. By studying the sequence of sedimentary layers, geologists can determine the relative age of the rocks and the events that have occurred in Earth's history. This helps establish a timeline of events and helps with correlating rock layers across different locations.
What do you call the layers in sedimentary rock?
Sedimentary rock layers. your welcome
In an undisturbed layer how do we know which layer was deposited first?
In an undisturbed layer, the principle of superposition helps determine the order of deposition. According to this principle, in any sequence of sedimentary rock layers, the oldest layers are at the bottom, and the youngest layers are at the top. Therefore, by examining the vertical arrangement of the layers, geologists can infer which layers were deposited first.
