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Foot Steps of the Ancient Great Glacier of North America - A Long Lost Document of a Revolution in 19th Century Geological Theory (Paperback, Softcover reprint of the original 1st ed. 2015)
Loot Price: R3,345
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Foot Steps of the Ancient Great Glacier of North America - A Long Lost Document of a Revolution in 19th Century Geological Theory (Paperback, Softcover reprint of the original 1st ed. 2015)
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John K. DeLaski, M.D. practiced medicine in the Penobscot Bay
region of Maine and, in addition, was a naturalist with keen powers
of observation. His study of the landscape led to the conclusion
that a thick glacier had overtopped the highest hills, flooded all
of Penobscot Bay, extended far to the east and west and probably
was part of a greater continental glacier. He published these very
critical field observations and inferences in numerous articles in
local newspapers and magazines, and in the American Journal of
Science in 1864. His work put him on the "team" of Benjamin
Silliman, James D. Dana and Louis Agassiz as an advocate for
glaciation as the regional land shaping force opposed to that of
the Biblical Deluge, a major scientific conflict of the day both in
North America and Europe. He remained a shadowy player, in the
background, but clearly contributed critical observations to the
argument through personal interactions with Agassiz and other
prominent naturalists. They incorporated DeLaski's observations
into their own presentations, often without giving him credit. John
DeLaski's summary work, a 400 page handwritten manuscript for the
book, "The Ancient Great Glacier of North America", was dated 1869.
He died in 1874 and the book was not published. The historic
significance of DeLaski's unpublished book is based upon its
startling contribution to one of the major scientific questions of
the day of whether the surficial geology of northern U.S. and
Canada was caused by the actions of the Biblical Flood or by
continental glaciation. If published, this would have been the
first book on this continent, at least, to present a holistic
discussion of the controversy in which he presented his critical
observations of the surficial geology in Maine, southern New
England and New Brunswick, Canada and concluded that these
depositional and erosional features must be of glacial origin.
DeLaski then incorporated other evidence into the book for
glaciation reported by others from the region during a decade or
two, and from the mid and far west and Canada to advocate that the
entire region was covered by an ice sheet that was at least 5,000
feet and probably much thicker over interior northern U.S. and
Canada and which terminated along a glacial margin which extended
from southern new England as far westward along the courses of the
Ohio, and Missouri Rivers. All this was done while most
"naturalists" still advocated the Biblical Flood to explain the
major components of the surficial geology in North America and
abroad. DeLaski's book containing his critical observations of
clearly so many landscape features of glacial origin, if published
would have been a pivotal document that would have strongly
supported those arguing for glaciations in the glaciations vs.
flood international argument.
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