My experiments with volcanoesJaggar, Thomas Augustus
Science
My experiments with volcanoes
Jaggar, Thomas Augustus
Geologists -- Biography; Volcanoes
After watching the sinking, which was followed by puffs of dust and
smoke and some avalanche noise, we took a car to the pit at once. And
when we got there in the early morning hours we found the pit enlarged
to 2,000 feet across, with the pattern of the lava lakes still apparent
at the bottom, indicating that the entire cylinder had lowered as a
unit to a depth of about 700 feet. Red hot avalanches were tumbling
inward with a roar, from the veneer of lava plastered on the wall.
By the forenoon of that day the liquid lava started to pour up and
inward as a ring of bubbling fountains all around the edges. What this
ring represented was the wall crack between the subsided cylinder
of semisolid lava, now pushing upward, and the funnel of rock wall
outside. This V-shaped filling grew wider as the uprising progressed,
and so the ring lake became wider, while the top of the harder column
became a ring of crags and the space inside became a quiet lava puddle
supplied by inflow from the ring lake. The whole column of ring crags
with the lagoon inside and the brilliantly fountaining lake outside
rose with unheard of rapidity during the next three weeks.
In mid-December, I took Mrs. Jaggar and a woman friend down to inspect
this amazing corolla, or lily, of hard crags which had blossomed up in
less than a month, so that the outer ring of boiling fluid was less
than a hundred feet below us. We stood at the rift in the Kilauea floor
which heads toward the southwest cliff, and suddenly we felt slight
earthquakes and saw the face of that cliff crumbling in a visible
tumble of rocks. The mountain was quietly breaking open athwart the
Kilauea caldera floor, and while we watched we saw forty or fifty low
lava fountains in a straight line burst up along a floor crack between
us and the cliff.
Remember that this crack traversed the downslope between Halemaumau
edge and Kilauea wall. Looking back at the ring lake, we saw it
beginning to lower and leave a shoreline of black plastering spatter.
When we looked into the rift crack at our feet, only one or two feet
gaping open, the liquid lava showed about twenty feet down. We were
standing on the side of the crack away from the motor car terminus, and
floods of lava on the Kilauea floor were spreading right and left from
the straight line of vents between us and Kilauea wall. We had to get
away from there pronto, as no one could tell what ground might erupt
between us and our car.
I carefully instructed our friend to be deliberate and step across the
fissure; but the girl felt sure that crossing a red hot crack called
for a leap. She stepped on a loose slab at the edge of the narrow chasm
and slipped into the crack, where she was wedged until we pulled her
out. We then stepped across the fissure, for the live lava was far
below, and made our way back to the car without further trouble.
Public-domain text, read in full here on John Shaqi.
Reviews
Reviews
No reviews yet
Be the first to share your thoughts on this work.
Elsewhere in the archive
Join the Discussion
Join the discussion
Sign in to leave a comment or review.
Sign InorCreate an account