[meteorite-list] abstracts available for INQUA Session 60 The enigmatic Younger Dryas climatic episode, July 2011 Bern, Switzerland -- two by Malcolm LeCompte: Rich Murray 2011.09.13

Wed Sep 14 01:43:55 EDT 2011

abstracts available for INQUA Session 60 The enigmatic Younger Dryas
climatic episode, July 2011 Bern, Switzerland -- two by Malcolm
LeCompte: Rich Murray 2011.09.13
http://rmforall.blogspot.com/2011/09/abstracts-available-for-inqua-session.html

http://www.inqua2011.ch/?a=programme&subnavi=abstract&id=1813&sessionid=60

Abstract Details
ID:	1813
Title:	Unusual material in early Younger Dryas age sediments and their
potential relevance to the YD Cosmic Impact Hypothesis
Session: 60 The enigmatic Younger Dryas climatic episode
Authors: Malcolm LeCompte
Albert Goodyear
Mark Demitroff
Dale Batchelor
Edward Vogel
Charles Mooney
Barry Rock
Presenter:	Malcolm LeCompte
Type:	 oral

Content:

The cause of the abrupt Younger Dryas (YD) climate change with its
North American megafauna extinctions, population bottlenecks, and
cultural disappearance remains enigmatic.
Iron- and silica-rich magnetic spherules reported from Younger Dryas
Boundary (YDB) sediments and dated to the stadial’s onset were
interpreted by some as cosmic impact relicts.
They interpreted Northern Hemisphere YDB spherules as either impact
ablation accumulations or ejecta.
Others, claiming adherence to the same protocol, reported an inability
to find spherule enhancement in YDB strata.

We review spherule identification and counting methodology of two
opposing studies.
An independent blind-test examination was conducted using samples from
two pre-YD occupation sites common to both studies: Blackwater Draw,
NM, and Topper, SC.
At Topper, samples were taken from sediments located above, adjacent
to, and at the Clovis artifact debitage layer.
Absence of overlying debitage indicates a multi-century hiatus in
human activity before successor culture reoccupation.
We found increased spherule abundance in YDB strata at both common sites.
We also report spherules present in YD-age sediment from Paw-Paw Cove,
MD, contrary to its reported absence.
Spherule geochemistry reflects similar iron, titanium,
aluminosilicate, oxygen, and carbon content at three widely separated
sites.
Spherules with elevated concentrations of rare earth elements
including Cerium, Lanthanum, and Praseodymium are occasionally
detected.
Our spherule positive results are consistent with the YD Cosmic Impact
Hypothesis study that found similar spherule composition and increased
abundances in YDB sediments.

Earlier negative results appear due to non-adherence of grain-size
sorting protocol and subsequent examination of smaller than
recommended aliquots.
Size sorting mitigates neurocognitive factors making optical
microspherule searches much less labor intensive.

http://www.inqua2011.ch/?a=programme&subnavi=abstract&id=3134&sessionid=60

ID: 3134
Title:	Carolina Bays: Younger Dryas Time Capsules
Session: 60 The enigmatic Younger Dryas climatic episode
Authors: Malcolm LeCompte
Kiara Jones
LaEsha Barnes
Ryan Lawrence
Cedric Hall
MyAsia Reid
Devina Hughes
Leroy Lucas
Mark Demitroff
David Kimbel
Presenter: Malcolm LeCompte
Type: poster

Content:

Cold, dry, windy conditions prevailed far south of the Laurentide Ice
Sheet during glacial epochs.
A half-million, similarly aligned, elliptically shaped, shallow
depressions or Carolina Bays are artifacts of potent Pleistocene
geomorphic forces.
We assume Bay formation by strong late Pleistocene winds deflating
loose sandy sediments to create hollows or blowouts.
Episodic modification continued into the early Holocene when dry,
windy periods alternated with wet, calm periods.
Windblown and water-borne sediments repeatedly filled Bay bottoms.
Their fill became a layered repository of transported material; time
capsules for post LGM history.
OSL, 14C dating, pollen analysis, and cultural assemblages have been
used to date Bays.
Rockyhock, Chowan County, NC and Kimbel, Cumberland County, NC,
provide an opportunity to examine Younger Dryas paleoenvironmental
conditions and test the Younger Dryas Impact hypothesis.
Both Bays were surveyed using Ground Penetrating RADAR to evaluate
subsurface structure.
Sediment composition differs between Bays;
Rockyhock contains fluvial sediments, while Kimbel is primarily aeolian fill.
Kimbel Bay’s windblown sediments contain significant quantities of
potential impact markers including: nanodiamonds, carbon spherules,
glasslike carbon, charcoal, and magnetic spherules.
Their exact chronostratigraphic significance remains undetermined.
Rockyhock Bay’s fluvial sediments contain only a very few magnetic
spherules in rim sediments.
Carbon spherules, glasslike carbon, and charcoal were not found with
analysis of bay center samples pending.
A relationship is probable between wind action and impact marker abundance.
Marker concentration may be enhanced by complex size segregation
dynamics during eolian activity.
Bay floors with bounding surfaces could be described as traps that
collected otherwise rare and widely scattered soil constituents.

http://nia.ecsu.edu/sp/staff/lecompte/cv.html

Malcolm A. LeCompte
Campus Box 672 ECSU, Elizabeth City, North Carolina 27909
            (252)267-1743       cell
            (252)335-3807       office
Email options:
lecomptem at mail.ecsu.edu, malecompte at aol.com, mlecompte at astrovision.com

http://cosmictusk.com/upcoming-bern-inqua-conference-packed-with-younger-dryas-boundary-studies

[ Put the ID number in place of 1813 or 3134 to get other abstracts ]

Abstracts for Session 60 “The enigmatic Younger Dryas climatic episode”
Oral Presentations July 20-27, 2011 INQUA Conference, Bern, Switzerland

ID	Title Presenter	Talknbr.	Invited
1666 Younger Dryas Onset Marked by Dramatic Environmental and Biotic
Change James Kennett 1 x
835 The Younger-Dryas Cold reversal: Ice-Earth-Ocean Intercations
During a Period of Rapid Climate Change	Richard Peltier 2 x
366 Assessing the effectiveness of different freshwater drainage
routes at triggering the Younger Dryas Alan Condron 3
2964 Reduced Atlantic Meridional Overturning Circulation (AMOC) and
Regional Climate Change During the Younger Dryas Jerry McManus 4 x
3138 Oceanic Variability in the Gulf of Alaska during the Younger
Dryas Summer K. Praetorius 5
1514 Abrupt changes in runoff from North America during the Younger
Dryas James Teller 6 x
262 Younger Dryas glaciation of Scandinavia – the type area for the
Younger Dryas Jan Mangerud	7 x
1813 Unusual material in early Younger Dryas age sediments and their
potential relevance to the YD Cosmic Impact Hypothesis Malcolm
LeCompte 8 x
2641 Exceptional iridium concentrations found at the Allerød-Younger
Dryas transition in sediments from Bodmin Moor in southwest England
William Marshall 9
1556 Nanodiamonds and the Usselo layer	Annelies van Hoesel 10
2768 Vegetation change and the Younger Dryas: a continental-scale
perspective	Matthew Peros 11 x
209 The Younger Dryas in the Neotropics: paleoecological evidence from
Venezuela Encarni Montoya 12 x

Posters

ID	Title	Presenter

583 New paleoclimatic reconstruction for the Allerød and Young Dryas
of the plain part of Ukraine (based on palynological data) Lyudmila
Bezusko
997 Vegetation dynamics during Younger Dryas climatic episode (12600 –
11500 yr. cal. B.P.) in Northwest Lithuania Eugenija Rudnickaite
1177 Effective moisture during the late glacial to Holocene transition
from mainland eastern Australia John Tibby
1181 The boundary phenomenon of the Pleistocene – Holocene in the
Baikal Siberia (Russia) Natalia Berdnikova
1184 A review on the radiocarbon and absolute chronologies bracketing
the Younger Dryas climatic event Edouard Bard
1294 Individual and community responses of diatoms to the Younger
Dryas climatic reversal in a South Carpathian glacial lake Krisztina
Buczkó
1378 North Atlantic reservoir ages linked to high Younger Dryas
atmospheric radiocarbon concentrations William Austin
1447 The Bull Creek valley stream terraces, buried soils, and
paleo-environment during the Younger Dryas in the Oklahoma Panhandle,
USA Alexander Simms
1526 Soot as Evidence for Widespread Fires at the Younger Dryas Onset
(YDB, 12.9 ka) James Kennett
1584 Human Population Decline across Parts of the Northern Hemisphere
during the Younger Dryas Cooling Period James Kennett
1587 Eastward Drainage of Glacial Lake Agassiz: The Perspective from
the Lake Superior Basin Steve M. Colman
1591 Nanodiamonds as Evidence for a Younger Dryas Cosmic Impact Event Allen West
1606 Shock-melt Evidence for a Cosmic Impact with Earth during the
Younger Dryas at 12.9 ka Allen West
1619 Evidence for Widespread Biomass-Burning at the Younger Dryas
Boundary at 12.9 ka Allen West
2667 Greater-than-present wet conditions from 14.6 to 10.2 cal ka yr
BP in the southwestern Great Lakes area, North America Brandon Curry
2765 Evidence of Younger Dryas aridity in dune-paleosol successions in
the Midwest of U.S.A. Hong Wang
2853 Pedogenic Climate Signals in the Great Plains (USA) during the
Pleistocene-Holocene Transition (Bølling/Allerød – Boreal) William C
Johnson
2875 The Allerød-Younger Dryas Transition in lake sediments from The
Netherlands Wim Hoek
3116 Megafaunal Extinction at the Younger Dryas Onset in North America
Douglas Kennett
3134 Carolina Bays: Younger Dryas Time Capsules Malcolm LeCompte

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

vast geoablation in Argentina, craters from SW to NE -- Cox re
Boslough bursts: Rich Murray 2011.07.31
http://rmforall.blogspot.com/2011/07/vast-geoablation-in-argentina-craters.html
http://tech.groups.yahoo.com/group/astrodeep/message/91

unique erratic 3 m rock, complex mixed composition, and many possibly
related airburst features W of Vaughn, New Mexico:
Dennis Cox: Rich Murray 2010.11.26
http://rmforall.blogspot.com/2010/11/unique-erratic-3-m-rock-complex-mixed.html
http://tech.groups.yahoo.com/group/astrodeep/message/78
http://rmforall.blogspot.com/2010/11/blog-post_27.html
12 photos of 3 m erratic rock 09-NOV-10 11:10:48 WP128 3 m rock,
34.600080 -105.342566 1.900 km el,
just S of SR 60 US 285, 8 km W of SR 54,
15 km W of Vaughn, NM, 57 km E of Laguna Del Perro impact field,
unique erratic 3 m rock, complex mixed composition.

Pierson Barretto gives best amateur site for worldwide evidence for
Holocene impacts: Rich Murray 2011.09.06
http://rmforall.blogspot.com/2011/09/pierson-barretto-gives-best-amateur.html

Pierson Barretto, a retired architech and long-time amateur astronomer
in Brazil, has completely surpassed Dennis Cox, Rich Murray, Michael
Davias, and other amateurs for the most convincing, detailed, and
dramatic introduction to worldwide evidence for Holocene impacts.

https://sites.google.com/site/cosmopier/
IMPACT CRATER Scars and Palaeolagoons
Under Continuous Construction
This site is dedicated to a new approach on solar system astrophysics,
archaeology, paleontology, archaeoastronomy, climate studies, water
resources and environmental evolution from the End-Pleistocene and
Holocene.
The site shares some clues about craters, scars, palaeolagoons and
their possible cosmic origin...

www.cosmictusk.com
blog for all point of view, now sharing major progress re mainstream research

within mutual service,  Rich Murray

Rich Murray, MA
Boston University Graduate School 1967 psychology,
BS MIT 1964, history and physics,
1943 Otowi Road, Santa Fe, New Mexico 87505
rmforall at gmail.com
            505-819-7388
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