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Arches National Park Geology Tour provides an extensive, visually rich description of the geology of Arches, by Deborah Ragland, Ph.D. See our DVD collection.
This is a map of Venus.
Click on image for full size
NASA

Venus Tessera

Tessera is a unique feature of Venus, found on Alpha Regio, Ishtar Terra, and Aphrodite Terra.

Tessera is created when the crust is pushed together. Then the surface folds and breaks. This process may be like mountain-building on Earth. But, because Venus lacks continental drift, mountain building must occur somewhat differently.

Tessera provide evidence that the surface of Venus may be in motion.


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Science, Evolution, and Creationism

How did life evolve on Earth? The answer to this question can help us understand our past and prepare for our future. Although evolution provides credible and reliable answers, polls show that many people turn away from science, seeking other explanations with which they are more comfortable....more

Alpha Regio

Alpha Regio is the home of Eve Mons, a volcano. ...more

Ishtar Terra

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

Aphrodite Terra

Aphrodite Terra, the Greek name for the goddess Venus, is about the size of half the continent of Africa, and is to be found along Venus' equator. Aphrodite Terra is different from Ishtar Terra in that,...more

Beta Regio

Beta Regio is an example of a volcanic rise, and is more like an island than a continent. Volcanic rises such as Beta Regio sometimes contain deep troughs. The troughs may be evidence of a surface inmotion....more

Venus Channels

This image clearly shows a bed where something once flowed. Without proper measurements, scientists can only guess what sort of liquid may have flowed through this channel. On Earth, such channels might...more

Venus Coronae

The feature of Venus' geography called a "Corona" is a deep, curving, trench surrounding an elevated plain. Coronae is the name for more than one corona. This is an image of Artemis Corona which is found...more

Venus Cratered Terrain

This is an example of the craters of Venus. Venus seems to have about 900 craters, which is about the same number of craters found on the surface of the Earth. Since we know that the Earth has an active...more

Windows to the Universe, a project of the National Earth Science Teachers Association, is sponsored in part by the National Science Foundation and NASA, our Founding Partners (the American Geophysical Union and American Geosciences Institute) as well as through Institutional, Contributing, and Affiliate Partners, individual memberships and generous donors. Thank you for your support! NASA AGU AGI NSF