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Chapter 11: Problem 23

What is flake tectonics? Why does Venus exhibit flake tectonics rather than plate tectonics?

Short Answer

Expert verified
Flake tectonics is a geological phenomenon where the lithosphere of a planet breaks into small pieces, or 'flakes', that interact with each other. It differs from plate tectonics, where the lithosphere breaks into larger plates. Venus exhibits flake tectonics instead of plate tectonics due to its more uniform and less fragmentary lithosphere that lacks conditions such as plate boundaries and seafloor spreading zones required for plate tectonics.

Step by step solution

01

Definition of Flake Tectonics

Flake tectonics refers to the geological phenomena where the lithosphere, the rigid outermost shell of a terrestrial planet, breaks into small pieces or 'flakes' that move and interact with each other. This tectonic activity is a significant process in shaping the crust of a planet.
02

Definition of Plate Tectonics

Plate tectonics is another geological phenomenon where the Earth's lithosphere is broken into large pieces or 'plates'. These plates move and interact due to the convective forces in the underlying mantle layer, leading to the creation of tectonic features like mountains, ocean trenches, and volcanoes.
03

Comparison between Flake and Plate Tectonics

The main difference between flake and plate tectonics lies in the size of the pieces that the lithosphere is broken into. In flake tectonics, the lithosphere breaks into many smaller pieces or 'flakes', whereas, in plate tectonics, the lithosphere is broken into larger 'plates'.
04

Tectonics on Venus

On Venus, the tectonic activity is characterized by the lithosphere breaking into smaller pieces, which is indicative of flake tectonics. This is because Venus lacks the conditions necessary for plate tectonics. Specifically, it lacks plate boundaries and seafloor spreading zones. Instead, it has a more uniform and less fragmentary lithosphere that breaks into smaller pieces, exhibiting flake tectonics.

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Most popular questions from this chapter

Explain why Mars can best be viewed from Earth while it is undergoing retrograde motion.

Why is it impossible to see Mercury or Venus in the sky at midnight?

In the classic Ray Bradbury science-fiction story "All Summer in a Day, "human colonists on Venus are subjected to con-tinuous rainfall except for one day every few years when the clouds part and the Sun comes out for an hour or so. Discuss how our understanding of Venus's atmosphere has evolved since this story was first published in \(1954 .\)

What kind of surface features are found on Mercury? How do they compare to surface features on the Moon? Why are they probably much older than most surface features on the Earth?

(a) The Grand Canyon in Arizona was formed over 15 to 20 million years by the flowing waters of the Colorado River, as well as by rain and wind. Contrast this formation scenario to that of Valles Marineris on Mars. (b) Valles Marineris is sometimes called "the Grand Canyon of Mars." Is this an appropriate description? Why or why not?
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