sinuous rille

sinuous rille

(sin -yoo-ŭs) See rille.
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The volume eruption rates deduced from the longer sinuous rille channel lengths are very similar to those found for the longest conventional lava flow units; modeling studies show that the turbulence leading to efficient thermal erosion was probably encouraged by a combination of unusually steep slope and unusually low lava viscosity.
The most famous sinuous rille, Hadley Rille (upper right), lies much farther east near the Apennine Mountains.
The most famous sinuous rille, Hadley Rille (above), lies much farther east near the Apennine Mountains.
The image below shows a collapsed skylight into a lava-tube cave beneath a sinuous rille in the volcanic Marius Hills region, an area well known to Moon observers for its domes (volcanic extrusions).
The Lunar 100 L Feature name Significance 11 Aristarchus Very bright crater with dark bands on its walls 17 Schroter's Valley Giant sinuous rille 22 Aristarchus Plateau Mysterious uplifted region mantled with pyroclastics For a complete listing, see Sky & Telescope: April 2004, page 113, or point your Web browser to SkyandTelescope.
The most striking feature of this part of the floor is a long sinuous rille that apparently originates from a small elongated crater located near the north wall.
Massive wrinkle ridges pass among these flooded older craters, and a somewhat sinuous rille cuts across ridges and maria north of Jansen, which is itself a lava-flooded crater.
These are hundreds to thousands of kilometers long (compared to the maximum length of a sinuous rille of a few hundred kilometers) and around 1 to 2 km wide.
High on my list are sinuous rilles, snakelike "riverbeds" that sometimes meander across the maria for hundreds of kilometers.
Snaky sinuous rilles are thought to be old lavariver beds or collapsed lava tubes.
Sinuous rilles, such as Hadley Rille, mark locations where rapidly flowing lavas cut winding channels.