title: Venus: further evidence of impact cratering and tectonic activity from radar observations.
abstract: Earth-based radar images at a resolution of 10 kilometers show a diverse surface terrain on Venus, probably produced by both impact events and tectonic activity. Only a small number of craters of apparent impact origin are seen. Large-scale features show lineaments and parallel ridges suggesting tectonic origins.
authors.forename: D B
authors.initials: DB
authors.lastname: Campbell
authors.forename: B A
authors.initials: BA
authors.lastname: Burns
authors.forename: V
authors.initials: V
authors.lastname: Boriakoff