The squiggly (or sinuous) rille seen hugging the western wall of Posidonius crater was formed by a massive outpouring of lava chaotically flowing across the landscape. Nearby is a totally different type known as a linear rille. It formed later, as the floor of the crater was uplifted and the now hardened lava cracked and pulled apart forming troughs.
|Long:||29.53°||Image Width:||68.0 km|
|Location in exhibit:||Lunar Vistas||Image ID:||M1108017413L|
|Image Width:||68.0 km|
|Location in exhibit:||Lunar Vistas|
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