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What layer of sedimentary rock was deposited first?

The layer of sedimentary rock that was deposited first is typically the lowest layer in a sedimentary sequence, known as the "oldest" layer. According to the principle of superposition, in undisturbed sedimentary rock formations, the layers are arranged with the oldest at the bottom and the youngest at the top. This means that the first layer deposited is usually the one furthest down in the sequence. However, geological events like folding or faulting can complicate this arrangement.


According to the law of superposition the lowest layer in a cross section of rock is what?

According to the law of superposition, the lowest layer in a cross section of rock is the oldest, as sedimentary rocks are typically laid down in sequence with the oldest rocks at the bottom and the youngest at the top.


What type of rock is Law of superposition?

The Law of Superposition is a geologic principle that states in a sequence of undisturbed sedimentary rock layers, the oldest layer is at the bottom and the youngest layer is at the top. It is not a type of rock; rather, it is a fundamental concept used in geology to determine the relative ages of rock layers.


Is the layer of rock at the bottom of a sedimentatry rock younger or older?

The layer of rock at the bottom of a sedimentary rock is older. This is due to the principle of superposition, which states that in an undisturbed sequence of rock layers, the oldest rocks are at the bottom and the youngest are at the top.


Where is the oldest rock layer in an undisturbed rock sequence?

In an undisturbed rock sequence, the oldest rock layer is typically found at the bottom. This is due to the principle of superposition, which states that in sedimentary rock layers, younger layers are deposited on top of older ones. Thus, as you move upwards through the sequence, the age of the rock layers decreases.

Related Questions

Which rock layer is the oldest and why?

The oldest rock layer is typically found at the bottom of a sequence of sedimentary layers, following the principle of superposition in geology. This principle states that in an undisturbed sequence of rock layers, the oldest layer will be at the bottom and the youngest at the top. Therefore, the rock layer closest to the Earth's surface is usually the youngest, while the rock layer at the bottom is the oldest.


What layer is sedimentary rock in?

sedimentary layer ㅡㅡ


What is a layer of sedimentary?

a layer of rock


According to the law of superposition the lowest layer in a cross section of rock is what?

According to the law of superposition, the lowest layer in a cross section of rock is the oldest, as sedimentary rocks are typically laid down in sequence with the oldest rocks at the bottom and the youngest at the top.


What type of rock is Law of superposition?

The Law of Superposition is a geologic principle that states in a sequence of undisturbed sedimentary rock layers, the oldest layer is at the bottom and the youngest layer is at the top. It is not a type of rock; rather, it is a fundamental concept used in geology to determine the relative ages of rock layers.


Is the layer of rock at the bottom of a sedimentatry rock younger or older?

The layer of rock at the bottom of a sedimentary rock is older. This is due to the principle of superposition, which states that in an undisturbed sequence of rock layers, the oldest rocks are at the bottom and the youngest are at the top.


Where is the oldest rock layer in an undisturbed rock sequence?

In an undisturbed rock sequence, the oldest rock layer is typically found at the bottom. This is due to the principle of superposition, which states that in sedimentary rock layers, younger layers are deposited on top of older ones. Thus, as you move upwards through the sequence, the age of the rock layers decreases.


Where will the oldest sedimentary rock be?

prahaps the museum


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.


What sedimentary rock is formed from thin layer of clay compacted very tightly together?

This is Shale, a Sedimentary rock.


What feature is formed when a sedimentary rock layer overlies a nonsedimentary rock layer?

Unconformity


Which layer of rock is the oldest?

The basement is a term sometimes used, and Cratonis another used in a continental context.The Principle of Superposition has it that in a given formation, the top layers are the youngest, and the deeper layers the oldest.