Pahoehoe, which is more fluid before hardening, spreads into sheets with smooth, glistening surfaces that are often twisted into ropelike wrinkles, pleats, and folds.

New basaltic lava generally has a very dark brown surface. As lavas age and weather, the surface colors may change as they become oxidized. Pahoehoe lava may take on a glossy, iridescent veneer due to chemical composition. The Blue Dragon and Green Dragon pahoehoe flows and the Vermilion Chasm are named for the striking lava colors in those areas.