CFE Review #7: Geologic Time

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What is Geologic Time?

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Geologic Time refers to the vast time scale used by geologists and paleontologists to describe the timing and relationships of events in Earth's history.

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What is the Law of Superposition?

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The Law of Superposition states that in undisturbed sedimentary rock layers, the oldest layers are at the bottom and the youngest layers are at the top.

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What is relative dating?

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Relative dating is a method used to determine the age of rocks and fossils in relation to one another, without determining their exact age.

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What is absolute dating?

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Absolute dating is a method used to determine the actual age of a rock or fossil, often through techniques like radioactive dating.

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What is a fossil?

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A fossil is the preserved remains or traces of ancient organisms, often found in sedimentary rocks.

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What is faulting?

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Faulting is the process where rocks break and move along a fracture, often causing earthquakes.

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What is folding?

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Folding is the bending of rock layers due to tectonic forces, often resulting in the formation of mountains.

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What is an igneous intrusion?

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An igneous intrusion occurs when magma from beneath the Earth's crust pushes into existing rock layers and solidifies.

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What are marine fossils?

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Marine fossils are the remains of organisms that lived in the ocean, which can be found in places that are now dry land due to geological changes.

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What is the significance of the Kaibab formation?

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The Kaibab formation is a geological formation that represents a relatively young layer of rock in the Grand Canyon, important for understanding the region's geological history.