 Analyses indicate that the flow must remain laminar, as turbulent flow would cool more quickly.This could be accomplished by sheet flow, which can travel at velocities of without turbulence and minimal cooling, suggesting that the Ginkgo flow occurred in less than a week.The cooling/hydraulics analyses are supported by an independent indicator; if longer periods were required, external water from temporarily dammed rivers would intrude, resulting in both more dramatic cooling rates and increased volumes of pillow lava.