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This image of Europa shows dark scalloped features that seem to have started in the center of the features and spread apart.
Click on image for full size
Image courtesy of NASA

Possible Spreading Centers on Europa

The surface of Europa shows many signs of that there may be a submerged ocean. For example, in this picture there are several dark bands that look like they could be joined at each edge. This may be a geologic feature that resembles what on Earth are called spreading ridges. Other signs of the potential for a submerged ocean include:

* flooded terrain

* 'freckles'

* rafting, and

* 'mushy' craters.

Last modified September 18, 2003 by Roberta Johnson.

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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