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This is a map of Venus.
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NASA

Venus Tessera

Tessera is a unique feature of Venus, and is also known as "complex ridged terrain". These features are found on some of the Venus Plateau Highlands.

Tessera is created is by a shortening of the lithosphere. That is, when the crust is pushed together, the surface folds, buckles, and breaks, and the crust itself becomes thicker. This process may be related to the process of mountain-building on Earth. But, because Venus lacks plate tectonics the process must occur somewhat differently. Most plateau highlands are thought to be regions where the crust is relatively thick. Because crustal material is less dense ("lighter") than the mantle rocks below, regions of thick crust rise higher than surrounding areas where the crust is thinner. This is illustrated in the above sketch.


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Science, Evolution, and Creationism

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Alpha Regio

Alpha Regio and Ovda Regio are examples of what is known as a "Plateau Highland" of Venus. Among the volcanic features of Alpha Regio is Eve Mons. Unlike volcanic rises, plateau highlands have few volcanoes,...more

Ishtar Terra

Ishtar Terra is one of the Plateau Highlands of Venus, is found near the north pole, and is about the size of the continental United States. Ishtar Terra contains the four main mountain ranges of Venus...more

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Beta Regio

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Venus Channels

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Venus Coronae

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Venus Cratered Terrain

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Windows to the Universe, a project of the National Earth Science Teachers Association, is sponsored in part is sponsored in part through grants from federal agencies (NASA and NOAA), and partnerships with affiliated organizations, including the American Geophysical Union, the Howard Hughes Medical Institute, the Earth System Information Partnership, the American Meteorological Society, the National Center for Science Education, and TERC. The American Geophysical Union and the American Geosciences Institute are Windows to the Universe Founding Partners. NESTA welcomes new Institutional Affiliates in support of our ongoing programs, as well as collaborations on new projects. Contact NESTA for more information. NASA ESIP NCSE HHMI AGU AGI AMS NOAA