That part of the regio in this quadrangle is a subcircular area of dark cratered material about 3,000 km across. The mappable area of the quadrangle is limited in the east by the terminator and in the north by the limb. The map units were identified on the basis of albedo, morphology, crater density, and geometric pattern.
Line geometry is topologically clean.
Information has been obtained from sources believed to be reliable, but its accuracy and completeness and the opinions based thereon, are not guaranteed. As every effort is made to provide accurate information in this database, USGS would appreciate it if users could call to our attention any errors that may occur by communicating with the contact person.