Dorsum Zirkel
Dorsum Zirkel is a wrinkle ridge at 28°06′N 23°30′W / 28.1°N 23.5°W northeast of Mons La Hire in Mare Imbrium on the Moon. It is 193 km long and was named after Ferdinand Zirkel in 1976.
Two small craters, La Hire A and B, lie on either side of the dorsum. The large crater Lambert is to the southeast, and the smaller McDonald is to the northeast.
Coordinates: 20°06′N 23°30′W / 20.100°N 23.500°W
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