Posted on 07/23/2009 7:00:35 PM PDT by SunkenCiv
Researchers have found shock-synthesized hexagonal diamonds on one of California's Channel Islands, which they say is the strongest evidence yet that a comet exploded in the atmosphere above North America, causing widespread extinctions there around 12,900 years ago... In 2007 researchers theorized that a comet set off continental fires that led to the mysterious disappearance of the Clovis people and the extermination of 35 mammal genera, including mammoths, mastodons, ground sloths and camels. The team documented a "black mat" of charcoal throughout North America that contains high levels of iridium, magnetic spheres, and nano-diamonds, which are consistent with such an airburst. The controversial theory also gibes with the 1908 Tunguska atmospheric detonation (also thought to be from a comet or meteorite) that leveled trees in Siberia, and it echoes the extraterrestrial impact widely believed to have wiped out the dinosaurs 65 million years ago.
Today, in Proceedings of the National Academy of Sciences, the same team reports on shock-synthesized hexagonal diamonds, known only from meteorite and other impact events, in a soot layer from Arlington Canyon on Santa Rosa Island in California. The canyon is famous for containing the earliest human remains in North America, dating back to 13,000 years, and the soot layer coincides with the disappearance of the pygmy mammoth from the island. In a documentary shown earlier this year on the Public Broadcasting Service's NOVA science show, the team also claimed that they discovered similar diamonds from the Greenland Ice Sheet dating to the same period.
What does the research team have to say about their doubters? "I'm so skeptical about the skeptics," says marine geologist James Kennett of the University of California, Santa Barbara. "We work in a different paradigm where different materials result from different kinds of impacts."
(Excerpt) Read more at scientificamerican.com ...
Heh... they don’t actually *grow* muck in them... the soil is a really dark black rich looking soil, and is great for various low crops (beets, sugar beets, carrots, etc, but also shrub farming, lots of stuff) and the fields tend to be dead flat level. :’)
Welcome to the GGG list. :’) I’ll send the official message in FReepmail.
Yeah, the way the impact location was figured out helps make the case compelling.
They’ve hung around some extinct ones, namely mammoths, and evidence was right in the bones and tusks.
I highly recommend the book (above) and believe you will enjoy it.
:’D
Which one?
Oh, ok, I got ya!
Sure glad I wasn't around when that thing hit.
Thanks!
Scared me for a second. ;’)
so far...
Discovered: Cosmic Rays from a Mysterious, Nearby Object
NASA | Nov 19th, 2008
Posted on 11/20/2008 11:23:12 AM PST by TaraP
http://www.freerepublic.com/focus/chat/2135448/posts
Study illuminates star explosion from 16th century
AP | 03 Dec 2008 | Malcolm Ritter
Posted on 12/03/2008 1:10:39 PM PST by BGHater
http://www.freerepublic.com/focus/chat/2142331/posts
Planet-dissolving Dust Cloud Is Headed Toward Earth!
Weekly World News, via Yahoo | Monday September 12 - 2005 | Mike Foster
Posted on 09/20/2005 5:25:47 AM PDT by vannrox
http://www.freerepublic.com/focus/chat/1487858/posts
-mostly-
What killed the mammoths and other behemoths?
FR Post 6-6-2 | Interview with Ross MacPhee
Posted on 06/05/2002 6:34:28 PM EDT by vannrox
http://www.freerepublic.com/focus/news/695260/posts
Ancient Atomic Warfare - Religious texts and geological evidence
New York Herald Tribune on February 16, 1947 | Ivan T. Sanderson
Posted on 07/22/2002 5:01:00 PM EDT by vannrox
http://www.freerepublic.com/focus/news/720501/posts
Supernova debris found on Earth
News@Nature.com | 02 November 2004 | Mark Peplow
Posted on 11/24/2004 4:22:08 PM EST by Phsstpok
http://www.freerepublic.com/focus/news/1287848/posts
Deep freeze dealt death knell to bison (Ice Age)
CBC News Online | 11/25/2004
Posted on 11/25/2004 10:25:47 PM EST by Fatalis
http://www.freerepublic.com/focus/news/1288596/posts
Supernova Storm Wiped Out Mammoths?
Discovery News | 09/28/05 | Jennifer Viegas
Posted on 10/05/2005 2:47:27 AM EDT by planetesimal
http://www.freerepublic.com/focus/news/1496844/posts
Supernova Storm Wiped Out Mammoths?
Discovery News | Sept. 28, 2005 | Jennifer Viegas
Posted on 10/17/2005 11:57:32 AM EDT by Fzob
http://www.freerepublic.com/focus/news/1503957/posts
Scientist: Comets Blasted Early Americans
ap on Yahoo | 10/28/05 | Meg Kinnard - ap
Posted on 10/28/2005 6:33:11 PM PDT by NormsRevenge
http://www.freerepublic.com/focus/news/1511330/posts
Terrestrial Evidence of a Nuclear Catastrophe in Paleoindian Times
Mammoth Trumpet | March 2001 | Firestone/Topping
Posted on 07/24/2006 3:03:03 AM EDT by ForGod’sSake
http://www.freerepublic.com/focus/news/1671134/posts
Did comet start deadly cold snap?
Canada.com | Monday, May 14, 2007 | Margaret Munro
Posted on 05/16/2007 6:00:33 PM EDT by Mike Darancette
http://www.freerepublic.com/focus/news/1834769/posts
Diamonds tell tale of comet that killed off the cavemen
Guardian | 5-20-07 | Robin McKie
Posted on 05/20/2007 7:50:33 PM EDT by Renfield
http://www.freerepublic.com/focus/news/1836898/posts
Catastrophic Comet Chilled and Killed Ice Age Beasts (and Clovis people)
Live Science | 05/21/07 | Jeanna Bryner
Posted on 05/22/2007 1:16:48 AM EDT by TigerLikesRooster
http://www.freerepublic.com/focus/news/1837610/posts
Oregon Researchers Involved In New Clovis-Age Impact Theory (More)
Eureka Alert
Posted on 05/23/2007 5:30:19 PM EDT by blam
http://www.freerepublic.com/focus/news/1838660/posts
Comet May Have Doomed Mammoths
Red Orbit | 5-26-07 | Betsy Mason
Posted on 05/26/2007 9:12:53 AM EDT by Renfield
http://www.freerepublic.com/focus/news/1840136/posts
Ice Age Ends Smashingly: Did A Comet Blow Up Over Eastern Canada? (More) (Carolina Bays)
Science News | 6-1-2007 | Sid Perkins
Posted on 06/02/2007 6:14:23 PM EDT by blam
http://www.freerepublic.com/focus/news/1843831/posts
Climate alarmists lose another piece of evidence
enterstageright | 6/11/2007 | Dennis T. Avery
Posted on 06/11/2007 1:11:38 PM EDT by Neville72
http://www.freerepublic.com/focus/news/1848385/posts
Comet Theory Collides With Clovis Research,
May Explain Disappearance of Ancient People
University of South Carolina(USC News) | June 28, 2007 | Staff
Posted on 08/04/2007 2:29:34 AM EDT by ForGod’sSake
http://www.freerepublic.com/focus/news/1876220/posts
NSF Press Release:
Comet May Have Exploded Over North America 13,000 Years Ago
National Science Foundation Press Release | August 14, 2007 | Cheryl Dybas, NSF
Posted on 08/15/2007 8:32:04 PM EDT by baynut
http://www.freerepublic.com/focus/news/1881784/posts
Research Team Says Extraterrestrial Impact To Blame For Ice Age Extinctions (More)
Eureka Alert | Northern Arizona University - Lisa Nelson
Posted on 09/25/2007 3:58:19 PM EDT by blam
http://www.freerepublic.com/focus/chat/1902003/posts
Cosmic blast may have killed off megafauna
Scientists say early humans doomed, too
Boston Globe | September 27, 2007 | Colin Nickerson
Posted on 09/25/2007 9:45:11 PM EDT by baynut
http://www.freerepublic.com/focus/news/1902154/posts
Cosmic blast may have killed off megafauna
Scientists say early humans doomed, too
Boston Globe | September 25, 2007 | Colin Nickerson
Posted on 09/26/2007 9:11:48 AM EDT by baynut
http://www.freerepublic.com/focus/news/1902361/posts
Evidence for an extraterrestrial impact 12,900 years ago
Proceedings of the National Academy of Sciences
October 9, 2007, Vol. 104 | September 27, 2007 | R. B. Firestone, et. al.
Posted on 09/30/2007 1:14:28 PM EDT by baynut
http://www.freerepublic.com/focus/chat/1904474/posts
The End of Eden: The Comet That Changed Civilization
amazon | Oct. 8, 2007
Posted on 10/09/2007 2:47:23 AM EDT by doug from upland
http://www.freerepublic.com/focus/news/1908525/posts
Great beasts peppered from space
BBC News | 12-11-07
Posted on 12/12/2007 9:55:00 AM PST by Renfield
http://www.freerepublic.com/focus/chat/1938461/posts
Did Comets Cause Ancient American Extinctions?
National Geographic News | 5-6-2008 | Anne Casselman
Posted on 05/07/2008 6:40:10 PM PDT by blam
http://www.freerepublic.com/focus/news/2012792/posts
Al Goodyear And The Secrets Of Ancient Americans
Free Times | 5-14/20-2008 | Ron Aiken
Posted on 05/15/2008 3:25:21 PM PDT by blam
http://www.freerepublic.com/focus/news/2016537/posts
Life Survived Catastrophic Space Rock Impact [Chesapeake Bay area]
Space.com | June 26, 2008 | Jeanna Bryner
Posted on 06/26/2008 8:04:37 PM PDT by ETL
http://www.freerepublic.com/focus/news/2037094/posts
First Humans To Settle Americas Came From Europe, Not From Asia....
Science Daily | 7-1-08
Posted on 07/03/2008 4:55:14 AM PDT by Renfield
http://www.freerepublic.com/focus/chat/2040167/posts
Exploding Asteroid Theory Strengthened By New Evidence Located In Ohio, Indiana
Physorg | 7-1-2008 | University of Cincinnati
Posted on 07/02/2008 3:27:51 PM PDT by blam
http://www.freerepublic.com/focus/chat/2039949/posts
Diamonds Rained Down During Ice Age
Live Science | JUL 7, 2008 | Ker Than
Posted on 07/07/2008 2:05:25 PM PDT by decimon
http://www.freerepublic.com/focus/chat/2042031/posts
Diamonds Rained Down During Ice Age ($$$)
LiveScience.com | July 7, 2008 | Ker Than
Posted on 07/08/2008 9:50:22 PM PDT by max americana
http://www.freerepublic.com/focus/chat/2042770/posts
Tracking down abrupt climate changes
(Rapid natural climate change 12,700 years ago)
Helmholtz Association of German Research Centres | Aug 1, 2008 | Unknown
Posted on 08/01/2008 11:03:47 AM PDT by decimon
http://www.freerepublic.com/focus/news/2054995/posts
Mammoth Mystery: The Beasts’ Final Years
Live Science | Sep 4, 2008 | Charles Q. Choi
Posted on 09/04/2008 10:42:29 AM PDT by decimon
http://www.freerepublic.com/focus/chat/2074657/posts
Scientists find signs of 13,000-year-old extinction event
Chicago Tribune | January 2, 2009 | Robert Mitchum
Posted on 01/01/2009 2:09:17 PM PST by neverdem
http://www.freerepublic.com/focus/news/2157352/posts
Scientists say comet killed off mammoths, saber-toothed tigers
www.physorg.com | 02 JAN 2009 | By Robert Mitchum
Posted on 01/02/2009 7:44:26 AM PST by Red Badger
http://www.freerepublic.com/focus/news/2157621/posts
Diamonds Linked to Quick Cooling Eons Ago
NY Times | January 2, 2009 | KENNETH CHANG
Posted on 01/02/2009 9:02:31 AM PST by Pharmboy
http://www.freerepublic.com/focus/news/2157663/posts
Six North American sites hold 12,900-year-old nanodiamond-rich soil
www.physorg.com | 01-01-2009 | Source: University of Oregon in Nanotechnology / Materials
Posted on 01/02/2009 10:44:35 AM PST by Red Badger
http://www.freerepublic.com/focus/news/2157721/posts
Did a Comet Hit Earth 12,000 Years Ago?
Scientific American | January 2, 2009 | David Biello
Posted on 01/02/2009 6:02:32 PM PST by neverdem
http://www.freerepublic.com/focus/news/2157910/posts
Mammoths wiped out by ‘perfect storm?’
Discovery | Jan. 2, 2009 | Michael Reilly
Posted on 01/03/2009 12:29:12 PM PST by decimon
http://www.freerepublic.com/focus/chat/2158199/posts
Humans to Blame for Extinction? - Not Necessarily So ...
Science News | July 21, 2009 | Science News
Posted on 07/21/2009 1:09:33 PM PDT by George - the Other
http://www.freerepublic.com/focus/news/2297700/posts
Kankakee Sand Islands:
Research Casts New Light On History Of North America
Newswise | 7-1-2008 | Valparaiso University
Posted on 07/01/2008 10:26:26 AM PDT by blam
http://www.freerepublic.com/focus/news/2039278/posts
First Humans To Settle Americas Came From Europe, Not From Asia Over Bering Strait -
ScienceDaily | July 17, 2008
Posted on 07/16/2008 8:02:06 PM PDT by Free ThinkerNY
http://www.freerepublic.com/focus/chat/2046692/posts
Mima Mounds:
Laser mapping may help solve the mystery of the Mima Mounds
Seattle Times | 03 Apr 2009 | Sandi Doughton
Posted on 04/06/2009 10:06:39 AM PDT by BGHater
http://www.freerepublic.com/focus/chat/2223436/posts
Best part is, it’s random events that do it.
Civ, thanks for all you do!
:’) Thanks neverdem.
http://www.dose.ca/news/story.html?id=1812566
http://www.pnas.org/content/early/2009/07/17/0906374106.abstract
My pleasure!
You’re welcome!
You've got waaaaay too much common sense.
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