2500-15-large satellites
2500-15-large satellites
2500-15-large satellites
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<strong>15</strong>.7 Comparing the Large Satellites<br />
Ganymede<br />
• These Factors Are Small – But Even When Taken Together - They<br />
Would Not Produce Differentiation on Their Own<br />
• Rather - They Triggered a Major Change in Another Internal<br />
Process – Possibly Upper Mantle Convection<br />
• Sufficient to Drive Early Plate Tectonics for 1 Billion Years<br />
• Finally - Cooling Produced a Phase Change of Interior Liquid<br />
Water to Solid Ice - Crust Cracked with Minor Mountain Building<br />
Shown to Scale in this Composite Galileo Photograph