Extended Data Fig. 2: Timescale of lateral spreading of foundered diapirs atop the lunar core.

Solid lines indicate the timescale of lateral spreading of a single foundered diapir (d=1) with melt viscosities of 102 Pa s (black) and 104 Pa s (magenta). Dashed line shows lateral spreading timescale for d equidistant foundered diapirs with a viscosity of 102 Pa s and of total volume equivalent to a foundered diapir of radius 100 km.