What is Zirkel?
'''Zirkel''' may refer to: *[[Ferdinand Zirkel]] (1838–1912), German geologist and petrographer *[[USS Zirkel (ID-3407)|USS ''Zirkel'' (ID-3407)]], a cargo ship that served in the United States Navy from 1918 to 1919 *[[Zirkel (Studentenverbindung)]], a symbol used in European Studentenverbindungen *[[Albert Zirkel]] (1885–?), American wrestler who competed in the 1904 Summer Olympics *[[Mount Zirkel]] *[[Dorsum Zirkel]], a wrinkle ridge in Mare Imbrium on the Moon. It is 193 km long and was named after Ferdinand Zirkel in 1976 {{disambiguation}}