[meteorite-list] George Howard at cosmictusk.com blog cites reliance on Todd Surovell 2009 paper by Mark Boslough 2012 Dec. critique of 2007 Richard Firestone YD comet fragment impact storm hypothesis -- Malcome LeCompte 2012 Sept. backs up Firestone: Rich Murray 2013.02.10

From: Rich Murray <rmforall_at_meteoritecentral.com>
Date: Sun, 10 Feb 2013 19:29:10 -0800
Message-ID: <CAHqJ8pZ6W7PbCofS3hN6SiVJQz7hgvvVU_A2M0XLmNqQenH_vg_at_mail.gmail.com>

George Howard at cosmictusk.com blog cites reliance on Todd Surovell
2009 paper by Mark Boslough 2012 Dec. critique of 2007 Richard
Firestone YD comet fragment impact storm hypothesis -- Malcome
LeCompte 2012 Sept. backs up Firestone: Rich Murray 2013.02.10
http://rmforall.blogspot.com/2013/02/george-howard-at-cosmictuskcom-blog.html


www.cosmictusk.com blog

Typical: Boslough completely ignores LeCompte

George Howard <george at restorationsystems.com>,

Boslough et al?s recent paper gives no less than nine separate
citations to Todd Surovell?s 2009 publication:
An independent evaluation of the Younger Dryas extra-terrestrial hypothesis.

The multiple references are hardly surprising given that the Surovell
paper has become a totem of Boslough and other?s crusade to end
research into the Younger Dryas Boundary Hypothesis.

What is surprising (if you are not already consumed by cynicism:) is
that Boslough finds no space in his whitewash to provide a full and
truthful review of Surovell?s work.

Most disturbingly, he entirely ignores LeCompte et al?s 2012 [ Sept.]
PNAS publication:
Independent evaluation of conflicting microspherule results from
different investigations of the Younger Dryas impact hypothesis

In LeCompte?s paper ? peer-reviewed and published in the one of the
world?s top journals ? Surovell?s 2009 work is left in tatters.

Making reference and citation to conclusions that present a challenge
to your position is certainly a difficult and personal experience.

Here at the Tusk, for instance, it always pains us a bit to post the
work of YDB critics.

But we do so because it maintains our intellectual integrity to
present both sides of the story.

>From LeCompte et al, 2012:

A summary comparison of the three protocols is in SI Appendix, Table S4.

[ Murray: They also presented new evidence that confirms a human
population crash at three sites for 600 to 1400 years. ]

http://cosmictusk.com/pnas-younger-drays-comet-paper-lecompte-s/
free full text

Independent evaluation of conflicting microspherule results from
different investigations of the Younger Dryas impact hypothesis

Malcolm A. LeCompte a,1, <malcolm.lecompte at cerser.ecsu.edu>,
Albert C. Goodyear b,
Mark N. Demitroff c,
Dale Batchelor d,
Edward K. Vogel e,
Charles Mooney d,
Barrett N. Rock f, and
Alfred W. Seidel g

a Center of Excellence in Remote Sensing Education and Research,
Elizabeth City State University, Elizabeth City, NC 27921

b South Carolina Institute of Archaeology and Anthropology,
University of South Carolina, Columbia, SC 29208;

c Department of Geography,
University of Delaware, Newark, DE 19716;

d Analytical Instrumentation Facility,
North Carolina State University, Raleigh, NC 27695;

e Department of Psychology,
University of Oregon, Eugene, OR 97403;

f Institute for the Study of Earth, Oceans and Space,
University of New Hampshire, Durham, NH 03824;

and g Seidel Research, Camden, NC 27921

Edited by* Steven M. Stanley, University of Hawaii, Honolulu, HI,
and approved August 7, 2012 (received for review May 22, 2012)

Abstract

Firestone et al. sampled sedimentary sequences at many sites across
North America, Europe, and Asia [Firestone RB, et al. (2007) Proc Natl
Acad Sci USA106:16016?16021].

In sediments dated to the Younger Dryas onset or Boundary (YDB)
approximately 12,900 calendar years ago, Firestone et al. reported
discovery of markers, including nanodiamonds, aciniform soot,
high-temperature melt-glass, and magnetic microspherules attributed to
cosmic impacts/airbursts.

The microspherules were explained as either cosmic material ablation
or terrestrial ejecta from a hypothesized North American impact that
initiated the abrupt Younger Dryas cooling, contributed to megafaunal
extinctions, and triggered human cultural shifts and population
declines.

A number of independent groups have confirmed the presence of YDB
spherules, but two have not.

One of them [Surovell TA, et al. (2009) Proc Natl Acad Sci USA
104:18155?18158] collected and analyzed samples from seven YDB sites,
purportedly using the same protocol as Firestone et al., but did not
find a single spherule in YDB sediments at two previously reported
sites.

To examine this discrepancy, we conducted an independent blind
investigation of two sites common to both studies, and a third site
investigated only by Surovell et al.

We found abundant YDB microspherules at all three widely separated
sites consistent with the results of Firestone et al. and conclude
that the analytical protocol employed by Surovell et al. deviated
significantly from that of Firestone et al.

Morphological and geochemical analyses of YDB spherules suggest they
are not cosmic, volcanic, authigenic, or anthropogenic in origin.

Instead, they appear to have formed from abrupt melting and quenching
of terrestrial materials.

http://www.sciencedaily.com/releases/2012/09/120918111320.htm

"However, a new study published Sept.17 in the Proceedings of the
National Academy of Sciences (PNAS) provides further evidence that it
may not be such a far-fetched notion.

USC archaeologist Albert Goodyear is a co-author on the study that
upholds a 2007 PNAS study by Richard Firestone, a staff scientist at
the Department of Energy?s Lawrence Berkeley National Laboratory.

Firestone found concentrations of spherules (micro-sized balls) of
metals and nano-sized diamonds in a layer of sediment dating 12,900
years ago at 10 of 12 archaeological sites that his team examined. The
mix of particles is thought to be the result of an extraterrestrial
object, such as a comet or meteorite, exploding in Earth?s atmosphere.
Among the sites examined was USC?s Topper, one of the most pristine
U.S. sites for research on Clovis, one of the earliest ancient
peoples.

?This independent study is yet another example of how the Topper site
with its various interdisciplinary studies has connected ancient human
archaeology with significant studies of the Pleistocene,? said
Goodyear, who began excavating Clovis artifacts in 1984 at the Topper
site in Allendale, S.C. ?It?s both exciting and gratifying.? "


Aug 31 to meteorite-list at meteroritecentral.com

smooth blue-black melt glaze on 2 sharp red-brown nearby surface rocks
under left side of Mount Sharp in Curiosity Mars panorama? Rich Murray
2012.08.31

http://www.panoramas.dk/mars/curiosity-first-color-360.html

high resolution adjustable view --

compare with surface glazes on sharp rocks in California and New Mexico:

pertinent features near Campbell Mountain, studied by Dennis Cox, by
his house in Fresno, CA: Rich Murray 2011.06.27
http://rmforall.blogspot.com/2011_06_01_archive.htm
Monday, June 27, 2011
http://tech.groups.yahoo.com/group/astrodeep/message/87

It is easy in a few hours to locate pertinent features to the N, E,
SE, and S of Campbell Mountain, studied by Dennis Cox, a few miles NE
of his house in Fresno, CA.

Maybe some of us can visit for a weekend and drive around, as many
intriguing sites can be found by roads.

http://craterhunter.wordpress.com/the-planetary-scaring-of-the-younger-dryas-impact-event/california-melt/

https://skydrive.live.com/?cid=5d6b9f6c30c6fe9f&sc=photos&id=5D6B9F6C30C6FE9F%21\1348
19 images of Fresno mountains and rock samples

Dennis Cox blog, plain text, with images of samples of magnetic black glaze
on melt rocks from 13 Ka ice comet fragment extreme plasma storm geoablation
in Fresno, California: Rich Murray 2010.07.02
http://rmforall.blogspot.com/2010_07_01_archive.htm
Friday, July 2, 2010
http://tech.groups.yahoo.com/group/astrodeep/message/53

photo of typical air burst geoablation glaze on hard bedrock at top of
Mount Helix park, E San Diego: Rich Murray 2012.03.15
http://rmforall.blogspot.com/2012/03/redbrown-glaze-on-hard-crystalline.html
http://rmforall.blogspot.com/2012/03/photo-of-typical-air-burst-geoablation.html
http://tech.groups.yahoo.com/group/astrodeep/message/98

10 m broken rock hill with black glazes, W of Rancho Alegre Road, S of
Coyote Trail, W of Hwy 14, S of Santa Fe, New Mexico, tour of 50
photos 1 MB size each via DropBox: Rich Murray 2011.07.28 2011.08.03
http://rmforall.blogspot.com/2011/08/10-m-broken-rock-hill-with-black-glazes.html
http://rmforall.blogspot.com/2011/08/35479730-106085926-1865-km-el-top-10-m.html
photos 3-5 of 50
http://tech.groups.yahoo.com/group/astrodeep/message/92

within the community of service,

Rich Murray,
Imperial Beach, CA 91932
rmforall at gmail.com
505-819-7388 cell
619-623-3468 home
Received on Sun 10 Feb 2013 10:29:10 PM PST