Buzzkill here, courtesy Fraser Cain: Paul Byrne [et al.] says Europa's seafloor is básalt. That's like the Lunar "seas", and most of Mars. This was reported 8 January but this youtube interview is our Q-n'-A.
The tidal processes on Europa suffice for an under-ice ocean; everyone has known this since Arthur C Clarke. But beneath this, is a black boring Abyssal Plain. No mountain ranges, no volcanic hotspots - thus sprach Dr Byrne.
Byrne notes the possibility of radioactive decay 19:15, but that's probably less 5.3 AU out than it is down here. Cold hydrothermal vents might form but they aren't warm enough for life.
So Clarke was wrong about what matters, which is whether Europa Report gazurtoids could form down here by nature.
BACKDATE 1/23
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