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View looking straight through a puka (hole) in the side of the hornito at the top of the Cookie Monster rootless shield; on the inactive Mother's Day tube. Large boulders are visible on the floor of the tube below.
The last incarnation of the Cookie Monster hornito
Looking up at the last incarnation of the Cookie Monster hornito, from inside the collapsed top of the Cookie Monster rootless shield, on the inactive Mother's Day tube.
This low mound is the point at which lava, upwelling from below, entered the Mother's Day lava tube. As the tube system died, the last lava to enter the tube ponded at, and plugged, the conduit carrying lava into the tube.
