Tags: Crater.
Lyell is a lunar crater that lies along the eastern edge of the Mare Tranquillitatis at the northern arm of the bay designated Sinus Concordiae. To the north along the edge of the lunar mare is the crater Franz. The region of terrain to the east of Lyell is named Palus Somni.The outer rim of this crater is an irregular series of ridges in a roughly circular formation. There are multiple gaps through this rim connected the interior to the mare in the west.
