MESSENGER's View of Hollows on Mercury; Links to the Planet's High Volatile Content.


April 9, 2021, noon - 1 p.m.
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Presented By:
David Blewett
APL, Johns Hopkins University &

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Observations by the MESSENGER spacecraft led to the discovery of an unusual landform on Mercury, named “hollows”. Hollows are shallow irregular depressions that appear to form by a process of volatile loss, similar to “sublimation degradation” known on icy surfaces. Hollows are a geomorphological manifestation of the unexpectedly high content of moderately volatile elements in Mercury’s crust.