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This is an example of Venus volcanism.
Click on image for full size
NASA/JPL

Volcanic Rises

Volcanic rises are more like islands than a continents. They are broad, sloping highlands over 1000 km across. Measurements suggest that there is hot magma deep beneath these rises that helps to buoy them up and support their mountains, as shown in this picture.

There are three particular types of volcanic rises:

  • Rift-Dominated Rises
    • These are rises that contain two or more deep rift valleys. Atla Regio and Beta Regio are rift-dominated rises.
  • Volcano-Dominated Rises
    • These rises contain one or more large shield volcanoes. Western Eistla Regio and Imdr Regio are volcano-dominated rises.
  • Corona-Dominated Rises
    • These rises lack large rift valleys, like volcano-dominated rises. But instead of being dominated by shield volcanoes, their surfaces are dominated by coronae. Corona-dominated rises include Eastern Eistla Regio and Themis Regio.


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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