From what I understand, these cones are pushed up during eruptions, but lava may not flow out of them.

It was a little moist (blowing mist), but a lot of fun.

The vents emit hot air with moisture. On this moist day it looks
like steam, but the air is just warm to the touch.

The surface of Kilauea Iki Crater has been pushed up places
and some of the cracks emit warm air or moisture.

In November 1959, this would have been a boiling lake of lava.  In 1988 they found the lava
had retreated to 300 feet below the surface.  I have never entered such a strange landscape.

A lava flow in 1959 ejected pumice cinders that covered a large region
down range from the Volcano.  This trail is built on top of the pumice and
shows how life is reclaiming the area.

The grass is starting to colonize the pumice field.  Once grasses have moved
in, leafy plants start to take over.

The ejected pumice was still hot and burned the trees it came into contact with.
The trees died and left holes in the pumice. The wood is now mostly gone, and many
of the holes have filled in with loose material.

Mark is in Lassen Park looking at the largest plume.