Beagle Rupes is an escarpment on Mercury, one of the highest and longest yet seen.[1] It was discovered in 2008 when MESSENGER made its first flyby of the planet. It has an arcuate shape and is about 600 kilometres (370 mi) long. The scarp is a surface manifestation of a thrust fault, which formed when the planet contracted as its interior cooled.[2]
Beagle Rupes consists of three segments. The central segment trends in the north–south direction and crosscuts the elliptically shaped Sveinsdóttir crater. The dimensions of the latter are 220 km × 120 km (137 mi × 75 mi). The floor of Sveinsdóttir was flooded by the smooth plains material and deformed by wrinkle-ridges before the appearance of Beagle Rupes. The maximum relief within the crater is about 0.8 km (0.5 mi). To the south of Sveinsdóttir the scarp turns to the southeast. A 27 km-diameter (17 mi) crater is superposed on this segment. To the north of Sveinsdóttir the scarp turns to northeast completing a large arc. This segment of Beagle Rupes crosscuts and deforms a small 17 km-diameter (11 mi) crater. The relief in this places reaches 1.5 km (0.9 mi). The scarp appears to be a young feature, which postdates the emplacement of the smooth plans and formation of the majority of impact craters.[2]
^ abWatters, Thomas R.; Solomon, Sean C.; Robinson, Mark S.; et al. (2009). "The tectonics of Mercury: The view after MESSENGER's first flyby". Earth and Planetary Science Letters. 285 (3–4): 283–296. Bibcode:2009E&PSL.285..283W. doi:10.1016/j.epsl.2009.01.025.
