This is a list of named geological features on Europa, a moon of the planet Jupiter. Craters and lineae are listed on separate pages: list of craters on Europa and list of lineae on Europa. Cavi Cavi are irregular steep-sided depressions that do not seem to be impact craters. Chaos On Europa, regions of chaotic terrain are named after places in Celtic mythology. Flexūs A flexus is a low, curved ridge with a scalloped pattern. Europan flexūs are named after the places visited by Europa during her journey with Zeus the bull. Fossae Fossae are named after ancient Celtic ancient stone rows. Large ringed features These impact structures are named after important locations in ancient history. Maculae Europan maculae (dark spots) are named after locations in Greek mythology, especially in the legend of Cadmus and his search for his sister, Europa. Mensae Regiones Europan regiones (regions) are named after locations in Celtic mythology. External links USGS, IAU: Europa nomenclature Europa