Fig. 2
From: Timing and duration of mare volcanism in the central region of the northern farside of the Moon
(a) TC mosaic image of Lacus Luxuriae and Buys-Ballot. Mean solar elevation angle of the original images is ∼7 degree. Counting areas are indicated by white lines. The bizarre shape of the count area for Buys-Ballot is due to excluding an area occupied by numerous secondary craters. (b and c) Close-up images of the northern unit and the southern unit in Lacus Luxuriae, respectively. The locations of these areas are shown as dashed boxes in (a). Stereographic projection centered at 20°N latitude and 175°E longitude.