My experiments with volcanoesJaggar, Thomas Augustus
Science
My experiments with volcanoes
Jaggar, Thomas Augustus
Geologists -- Biography; Volcanoes
The logic to the effect that in the long and large the old volcanoes
from Hawaii to Midway have been on slices of the earth’s crust faulted
downward below sea level through the ages seems incontrovertible. The
fault planes are diagonals across the main volcanic rift trend and make
the channels between the islands at an angle in plan to the trend of
the island chain. These channels are very deep. All of this philosophy
developed in my mind before I came to Hawaii.
Also I thought that the origin of life might have been from volcanic
gas, owing to the prominence of carbon dioxide, water vapor, hydrogen,
sulfur, and nitrogen, all ingredients of both protein and volcanoes.
I put this up to R. T. Jackson, who taught me phylogeny when I was
studying fossils and he was studying genetics. Knowing the sulfurous
quality of an egg yolk, I asked him if it wasn’t possible that as
evolution goes back behind the embryo, we should find volcanic traces
chemically. Phylogeny means that the history of the embryo reenacts the
history of the race, and I merely extended this back to the inorganic.
I was laughed at for carrying biological origin back to gases of
volcanoes; but Shepherd and I collected gases from flaming Kilauea
lava, and found the five elemental constituents: carbon, oxygen,
nitrogen, hydrogen, and sulfur. These also make up the aminoacids
of protein, so my philosophy of origin still seemed to me to be
reasonable. Volcanoes erupted through the ocean, and life came out of
the unexplored deeps of the sea.
Thus in 1910 I began a book on craters which came to fruition in a
Memoir of the Geological Society. This was not published until 1947,
but I was working on it, drawing the diagrams, dictating the typescript
to Sato, and selecting for illustration the best of our photographs
during the thirties.
One of the diagrams shows eleven-year cycles, beginning with 1790
and ending with 1935. I adopted this after finding in Hitchcock a
tabulation for Halemaumau, indicating big lowerings of lava in 1790,
1823, 1855, and 1891, to which we added 1924 from our own experience.
These were approximately thirty-three years apart, as I found when I
plotted the data on a curve of Hitchcock’s table. Taking other major
sinkings as punctuation points--such as the outflows and collapse
of Halemaumau in 1832, 1840, 1868, and 1931--there developed a
correspondence in the subsidence times treated as repose periods, with
the years having the least numbers of sunspots at average intervals of
11.1 years. The intervening times of maxima of sunspots all occurred in
the intermediate times of rising lava.
Public-domain text, read in full here on John Shaqi.
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