# When undisturbed sedimentary rock will form and remain in horizontal layers?

## When undisturbed sedimentary rock will form and remain in horizontal layers?

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Term uniformitarianism Definition the principal that earths history can be explained by current geologic processes
Term sedimentary rocks left undisturbed will remain in horizontal layers Definition what is the principal of original horizontality

### What would layers of undisturbed sedimentary rock typically look like?

sedimentary rocks form in horizontal layers and undisturbed rock layers remain horizontal.

#### When considering several layers of undisturbed sedimentary rock which layer will be the oldest?

Superposition. Sedimentary rocks are deposited one on top of another. Therefore, the youngest layers are found at the top, and the oldest layers are found at the bottom of the sequence.

What is the relationship between undisturbed sedimentary rock layers and fossils?

A principle of law stating that within a sequence of undisturbed sedimentary rocks, that the oldest layers are on the bottom and the youngest are on the top. rock layers have a unique set of fossil animal and plant remains which can be used to determine the relative ages of rock layers.

When younger sedimentary layers are deposited on top of older eroded horizontal sedimentary rock layers is called a?

The boundary between horizontal layers of old sedimentary rock and younger, overlying layers that are deposited on an eroded surface is called a disconformity. According to the Law of Superposition, all rocks beneath an unconformity are older than the rocks above the unconformity. Page 7.

## Which of these teaches that younger layers of undisturbed sedimentary rock are above older layers choose the correct answer?

Each layer will be successively younger or more recent. This is called superposition. Superposition is the principle that says younger rocks lie above older rocks in an undisturbed sequence. Scientists use the fossils of animals to help determine relative age.

### Which layer describe the law of horizontal?

Law of Horizontality As sediments deposit, they deposit in horizontal layers. This is known as the Law of Horizontality. The oldest layers are at the bottom and the newest layers are at the top. If you were to dig down through the layers, you would be going back in geologic time.

#### Which layer is the oldest rock layer?

bottom layer
The bottom layer of rock forms first, which means it is oldest. Each layer above that is younger, and the top layer is youngest of all. This ordering is relative because you cannot be sure exactly when each layer formed, only that each layer is younger then the one below it.

What can you tell from undisturbed rock layers?

What can you tell about undisturbed rock layers? Sedimentary rock layers form with the youngest layer on top and oldest layer at the bottom. Why are radioactive elements useful for determining absolute age? Particular radioactive elements always break down at the same rate into the same other form.

What principle states that in an undisturbed succession of sedimentary rocks the oldest layer is at the bottom and the youngest is at the top?

The principle of superposition states that, in a series of undisturbed layers, the oldest layer is on the bottom and each overlying layer is progressively younger with the youngest layer on the top. Groups or assemblages of plant and animal fossils appear in the geologic record in a specific order.

## What is the order of undisturbed rock layers?

a basic law of geochronology, stating that in any undisturbed sequence of rocks deposited in layers, the youngest layer is on top and the oldest on bottom, each layer being younger than the one beneath it and older than the one above it.

### Is the principle that in undisturbed rock layers the oldest rocks are on the bottom?

The principle of superposition states that in an undisturbed rock sequence, the oldest rocks are at the bottom and each successive layer is younger than the layer beneath.

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