A "bathtub ring" of black lava forming a rim on the vent wall (betw...
Detailed Description
By mid-afternoon, when these photos were taken, the drop in the lava lake level was obvious. A "bathtub ring" of black lava forming a rim on the vent wall (between the lighter-colored rocks higher in the wall and the surface of the lava lake) provides a record of the lake's previous higher level.