Mommur Chasma
Mommur Chasma is the largest 'canyon' on the known part of the surface of Uranus' moon Oberon. This feature probably formed during crustal extension at the early stages of moon's evolution, when the interior of Oberon expanded and its ice crust cracked as a result. The canyon is an example of graben (rift valley) or scarp produced by normal fault(s). The chasma was first imaged by Voyager 2 spacecraft in January 1986.

The "Gazetteer of Planetary Nomenclature" states that Mommur Chasma is named after the forest home of the fairy king Oberon in "A Midsummer Night's Dream". In fact, Oberon's home is not named in Shakespeare's play; it appears instead in the French epic "Huon of Bordeaux".
Q1068071
canyon
LOC
Q324
Uranus
CEL
Q3332
Oberon
CEL
Q4232578
crust
Concept
Q192810
graben
Concept
Q2366717
rift valley
Concept
Q475080
scarp
Concept
Q47089
normal fault
Concept
Q48475
Voyager 2
MISC
None
Gazetteer of Planetary Nomenclature
UNK
Q1139234
Oberon
MISC
Q104871
A Midsummer Night's Dream
MEDIA
Q2984079
Huon of Bordeaux
MEDIA
Q386018
Mommur Chasma
LOC
Q386018
Mommur Chasma
LOC
1986-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
January 1986
DATE
+2^^http://www.w3.org/2001/XMLSchema#decimal
2
NUMBER
instance of
located on astronomical body
parent astronomical body
characters