GEOL 212 Lecture Notes - Lecture 1: Mid-Ocean Ridge, Galilean Moons
24 Dec 2016
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Projectory: as they approach planet they will orbit, they photograph outer moons. Parrel lines, with cross cuts, looks like europa"s parraellel linae bands, those bands. Largest moon, airless too like all galilean moons. Metalic core, rocky mantle, ices (liquid or solid, not clear, weak magnetic field like. Light grooved terraub on europa resemble magnetic records on ocean flooring!!! That records poles reversing and the geological process of sea floor age and its spreading=mid ocean ridge. Not huge amount of crust being created, create new crust in one place, destroy it in another. Some point in the past where active tectonics and creation of new crust on grooved terrain= craters more common, its older than europas surface tectonic wild time. Only old dark terrain of ganamede: further out of solar system. Look at density=made up of water in solid form=ice. Small icy moon, mostly water, water freezing, volume increased.
