Learning about Earth's Past: Landform Diagrams

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What is the main concept behind the law of superposition?

Younger rocks are always layered on top of older rocks.

The youngest rocks are at the bottom and the oldest rocks are at the top.

The oldest rocks are at the bottom and the youngest rocks are at the top. (correct)

The layers of rocks are always tilted at an angle.

How can you infer that an intrusion is younger than the rock layers it cuts across?

The intrusion would have fewer visible layers.

The intrusion would be tilted at a different angle from the rock layers.

The intrusion cuts across the existing rock layers without bending them. (correct)

The intrusion would show signs of erosion.

What geological event could have caused a big unconformity as described in the text?

Meteorite impact

Volcanic eruption

Severe earthquake

Glacial movement (correct)

What key idea states that sedimentary rocks are originally formed in horizontal layers?

Horizontality principle Signup and view all the answers

In a scenario where a river erodes away existing rock layers and new sediment begins to accumulate, what geological process is exemplified?

Deposition Signup and view all the answers

What happened first in the formation of the landform?

Layering of rock Signup and view all the answers

According to the law of superposition, which layer would be the oldest in the formation?

Layer 1 Signup and view all the answers

What caused the folding and bending of the rock layers?

Forces in the earth Signup and view all the answers

What geological event would come after the deposition of layers 1-4 in the landform formation?

Magma leaking through the rock Signup and view all the answers

Why are layers 6 and 7 at the top of the landform formation?

They were eroded down to form an unconformity Signup and view all the answers

What is the main principle of geology that states that the present is the key to the past?

Uniformitarianism Signup and view all the answers

What is a landform diagram?

A drawn cross-section of a landform showing its layers Signup and view all the answers

Why is the law of original horizontality important in deducing geological history?

It describes how rock layers are initially deposited horizontally Signup and view all the answers

What does studying a landform diagram help us understand?

The changes that occurred to the landform over time Signup and view all the answers

Which term refers to the idea that natural laws have stayed consistent throughout Earth's history?

Uniformitarianism Signup and view all the answers

Learning about Earth's Past: Landform Diagrams

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