The more pronounced lave flow fields are named fluctūs, and their presence has lead to the leading hypothesis that these plains are formed by lava flows that have been exposed to compressional and extensional stresses.
The more pronounced lave flow fields are named fluctūs. The presence of surface flow patterns, in conjunction with crosscutting valleys, has lead to the leading hypothesis that these plains likely formed by global lava flows over a short timescale and were subsequently exposed to compressional and extensional stresses.