An arching fountain of
pāhoehoe lava, approximately 10 m (33 ft) high, issuing from a spatter cone of Pu‘u Kahaualea,
Hawaii. Pāhoehoe is
basaltic lava that has a smooth, billowy, undulating, or ropy surface. These surface features are due to the movement of very fluid lava under a congealing surface crust. Pāhoehoe lavas typically have a temperature of 1100°C–1200°C.
Photo credit: J.D. Griggs, USGS