This is an image of the Uruk Sulcus Region of Ganymede.
Click on image for full size
There has been no icy volcanism on Ganymede, but it does seem that there has been a kind of tectonism, or surface motion.
Examination of the surface of Ganymede reveals many kinds of faulting and fracture. These provide evidence of stress (pushing and shoving) which the crust of Ganymede has undergone through time.
Examination of the surface of Ganymede shows:
- Graben style faulting (another name for continental rifting)
- Imbricate faulting (like a leaning stack of bricks)
Examination of the surface also shows a sequence of deformation, where the younger areas were deformed differently than the older areas.
This style of icy-tectonism proves to be different from either that of Callisto or Europa. (The other major moon of Jupiter, Io has a more conventional form of volcanism.) The difference has to do with processes in the interior of Ganymede
Last modified February 26, 2007 by Lisa Gardiner.
Shop Windows to the Universe Science Store!
Our online store
on science education, classroom activities in The Earth Scientist
specimens, and educational games
You might also be interested in:
Instead of icy-volcanism, the surface of Ganymede reveals a gradual surface deformation remeniscent of the crustal deformation of the Earth. In this case, crustal extension of the surface of Ganymede resulted...more
The diagram to the left shows a cutaway of the possible interior structure of Ganymede, based on recent measurements by the Galileo spacecraft. It shows a small core of metal, overlain with some rocky...more
This image shows an example of the light terrain of Ganymede. The image shows the contrast between the light terrain and the dark terrain of Ganymede. The light terrain is where the grooves of Ganymede...more
The surface of Ganymede is halfway between that of Callisto and that of Europa. Portions of the crust are of ancient age, while other portions are relatively new. The little white dots shown in this image...more
Amalthea was discovered by E Barnard in 1872. Of the 17 moons it is the 3rd closest to Jupiter, with a standoff distance of 181,300 km. Amalthea is about the size of a county or small state, and is just...more
Callisto was first discovered by Galileo in 1610, making it one of the Galilean Satellites. Of the 60 moons it is the 8th closest to Jupiter, with a standoff distance of 1,070,000 km. It is the 2nd largest...more
Most of the moons and planets formed by accretion of rocky material and volatiles out of the primitive solar nebula and soon thereafter they differentiated. Measurements by the Galileo spacecraft have...more