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...y differentiated into a rocky [[core (geology)|core]] and an icy [[mantle (geology)|mantle]]. A layer of liquid water may be present at the core/mantle bounda ...on-ice component.<ref name=Hassmann2006/> The latter could include [[rock (geology)|rocks]] and heavy [[organic compound]]s. The presence of water ice is supp ...

Callisto is composed of approximately equal amounts of [[rock (geology)|rock]] and [[Volatiles|ice]]s, with a mean [[density]] of about 1.83&nbsp; ...cale, the surface is varied and consists of small, bright frost [[deposit (geology)|deposits]] at the tops of elevations, surrounded by a low-lying, smooth bl ...

...s ancient, cover the remainder. The cause of the light terrain's disrupted geology is not fully known, but was likely the result of [[tectonics|tectonic]] act ..._oceans.pdf|format=pdf}}</ref> The exact composition of Ganymede's [[Rock (geology)|rock]] is not known, but is probably close to the composition of [[L chond ...

...uri star]] stage; here, formation of small [[dust]] grains made of [[rock (geology)|rock]]s and ices is possible. The grains may eventually [[coagulation|coag ...he [[volatiles|volatile]] material&mdash;water, organics, and some [[rock (geology)|rocks]] to evaporate, leaving only the most [[refractory]] elements like [ ...

===Geology=== {{main|Geology of Mars}} ...

...he [[silicate]]s which form their [[crust (geology)|crusts]] and [[mantle (geology)|mantles]], and metals such as [[iron]] and [[nickel]], which form their [[ ...ial planets, such as volcanism and internal heating.<ref>{{cite web |title=Geology of the Icy Galilean Satellites: A Framework for Compositional Studies |auth ...

Earth's [[Crust (geology)|outer surface]] is divided into several rigid segments, or [[tectonic plat ...interior remains active, with a thick layer of relatively solid [[Mantle (geology)|mantle]], a liquid [[outer core]] that generates a magnetic field, and a s ...

...em's formation). While the asteroid belt is composed primarily of [[Rock (geology)|rock]] and [[metal]], the Kuiper belt objects are composed largely of froz ...

...variety of scientific disciplines including [[astronomy]], [[physics]], [[geology]], and [[planetary science]]. Since the dawn of the [[space age]] in the 19 ..., William H. Peck, Colin M. Graham | doi=10.1038/35051550 | url=http://www.geology.wisc.edu/%7Evalley/zircons/Wilde2001Nature.pdf | format=PDF | year= 2001 }} ...

...his darker and hotter region condenses into a superheated liquid [[mantle (geology)|mantle]], where temperatures reach 2,000&nbsp;K to 5,000&nbsp;K. The mantl ...