A maar will almost always fill with water to form a relatively shallow crater lake.
But why the name lunar?
Possibly, the volcanic field reminded geologists of the surface of the moon.
Vents include cinder cones, elongate fissures, and at least two maars.
Several other northeast-trending alignments of closely spaced and coalesced cinder cones characterize the field.
The big circular structure on the left is the Lunar Crater.
The small hill like mounds surrounding the crater are cinder cones.Photo credit
The Lunar Crater.Photo credit
