title: Lunar ring dikes from orbiter I.
abstract: Orbiter photographs of the wall of a large circular formation on the moon show that the wall is a convex body resembling a flow of viscous lava. The slopes are less than the angle of repose of dry rock; hence an explanation in terms of mass wastage is hard to support. The viscosity is approximately 10(13) centimeter-gram- second units, indicating an acid lava.
authors.forename: J A
authors.initials: JA
authors.lastname: O'keefe
authors.forename: P D
authors.initials: PD
authors.lastname: Lowman
authors.forename: W S
authors.initials: WS
authors.lastname: Cameron