Did Asteroids And Comets Turn The Tides Of Civilization?

Discovering Archaeology ^ | July/August 1999 | Mike Baillie

[SunkenCiv]

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[SunkenCiv]

[SunkenCiv]

Astronomy & Geophysics
Volume 45 Issue 1 Page 1.23 - February 2004
doi:10.1046/j.1468-4004.2003.45123.x
Volume 45 Issue 1

Comet impact
A comet impact in AD 536?
Emma Rigby1, Melissa Symonds2 and Derek Ward-Thompson2

Emma Rigby, Melissa Symonds and Derek Ward-Thompson review the evidence for the possibility that a comet may have impacted the Earth in historical times, and discuss the size of the putative comet.

Abstract

A global climatic downturn has previously been observed in tree-ring data associated with the years AD 536–545. We review the evidence for the explanation of this event which involves a comet fragment impacting the Earth and exploding in the upper atmosphere. The explosion would create a plume, such as was seen during the impact of comet Shoemaker-Levy 9 with Jupiter. The resulting debris deposited by the plume on to the top of the atmosphere would increase the opacity and lower the temperature. We calculate the size of the comet required, and find that a relatively small fragment of only about half a kilometre in diameter could be consistent with the data. We conclude that plume formation is a by-product of small comet impacts that must be added to the list of significant global hazards posed by near-Earth objects.

Article published online 28 Jan 2004

Affiliations

1Cardiff University, UK (now at Edinburgh University, UK)2Cardiff University

The authors thank Mike Baillie, Mark Bailey, Martin Johnson, Ted Johnson-South and David Williams for interesting and helpful discussions.

To cite this article
Rigby, Emma, Symonds, Melissa & Ward-Thompson, Derek (2004)
A comet impact in AD 536?.
Astronomy & Geophysics 45 (1), 1.23-1.26.
doi: 10.1046/
j.1468-4004.2003.45123.x

Blackwell Synergy® is a Blackwell Publishing, Inc. registered trademark

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[gleeaikin]

boloid/civilization placemark

[SunkenCiv]

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[JimRed]

Didn't Igor Velikovsky say some of this about 50 years ago?

Immanuel Velikovsky, I believe, in "Worlds in Collision", written about 1950 or so. It is an interesting read, well researched, and the space program proved some of his theories to be correct.

[parsifal]

Great post. I wonder tho if this could have been volcanic?

parsy, who has wide interests

[parsifal]

WHOA! this is like a 2002 article on fr.

Still a good read.

parsy, who can’t believe it has been this long.

[mj81]

A thread from long ago caught my attention. Perhaps you might find of interest the slide presentations at the following links:

http://www.threeimpacts-twoevents.com/wp-content/uploads/2013/01/SIMULTANEOUS-IMPACTS-3JAN2013-WEBSITE.pdf

http://www.threeimpacts-twoevents.com/wp-content/uploads/2013/01/COMET-IMPACT-ANALYSIS-AND-EFFECTS-3JAN2013-WEBSITE.pdf

[blam]

Thanks. There's a lot of work there. I'll spend more time with it later.

Reference post #89. I believe FReeper gleeaikin may have a greater interest in this sort of stuff than me.

[SunkenCiv]

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[SunkenCiv]

The rest of the mikebaillie keyword, newest to oldest:

• Prehistoric mass graves may be linked to tsunamis, new research reveals [2018]
• Two volcanoes trigger crises of the late antiquity [2016]
• Signs of ancient megatsunami could portend modern hazard [2015]
• Ancient Crash, Epic Wave [2015]
• Mega wave hit Oman's coast 4,500 years ago [2014]
• 500-Year-Old Traces of Monster Hawaii Tsunami Discovered [2014]
• Sumatra coastal cave records stunning tsunami history [2013]
• Sumatra coastal cave records stunning tsunami history [2013]
• Prehistoric mass graves may be linked to tsunamis, new research reveals [2018]
• Two volcanoes trigger crises of the late antiquity [2016]
• Signs of ancient megatsunami could portend modern hazard [2015]
• Ancient Crash, Epic Wave [2015]
• Mega wave hit Oman's coast 4,500 years ago [2014]
• 500-Year-Old Traces of Monster Hawaii Tsunami Discovered [2014]
• Sumatra coastal cave records stunning tsunami history [2013]
• Sumatra coastal cave records stunning tsunami history [2013]
• Mayan Match!: Baillie discovers correlation between ice core chemistry spikes & Mayan Long Count... [2012]
• The tsunamis of Olympia [2011]
• Ancient stone markers warned of tsunamis [2011]
• In the Mediterranean, Killer Tsunamis From an Ancient Eruption [2009]
• Mega-Tsunami Theory Disputed (Australia) [2008]
• Did A Comet Cause The Great Flood? [2007]
• Did an Asteroid Impact Cause an Ancient Tsunami? [2006]
• Ancient Crash, Epic Wave [2006]
• Charcoal reveals wildfire history [2006]
• Massive Earthquake Destroyed Ancient City Of Anamurium, Say Scientists [2006]
• Ancient Volcano, Seeds And Treerings, Suggest Rewriting Late Bronze Age Mediterranean History (More) [2006]
• Olive branch solves a Bronze Age mystery [2006]
• ARCHAEOLOGY: New Carbon Dates Support Revised History of Ancient Mediterranean [2006]
• Tale Of (King) Arthur Points To Comet Catastrophe [2006]
• Anatolian tree-ring studies are untrustworthy [2006]
• Moses' Comet [2005]
• Roman Comet 5,000 Times More Powerful Than A-Bomb [2004]
• Grains Found in Ga. Traced to Asteroid [2004]
• Mesopotamian Climate Change (8,000 Years Ago) [2004]
• Astronomers unravel a mystery of the Dark Ages [2004]
• (Prince) Madoc In America [2003]
• SIBERIA METEORITE FLATTENS 40 SQ MILES [2003]
• The Dark Ages: Were They Darker Than We Imagined? [2003]
• Meteor Clue To End Of Middle East Civilisations [2003]
• Evidence Of Tunguska-Type Impacts Over The Pacific Basin Around The Year 1178 AD [2003]
• An Impact Event in 3114BC? The beginning of a Turbulent Millennium. [2003]
• The missing sun temples! (Where are they?) [2003]
• Evidence for Major Impact Events in the late Third Millennium BC [2002]
• Comets,Meteors & Myth: New Evidence For Toppled Civilizations And Bibical Tales [2002]
• Asteroid Tsunamis Could be Huge, Slow [2002]
• Archaeologists Unearth 1,700 Year-Old Canal System Near Lake Okeechobee (Florida) [2002]
• A CATASTROPHICAL SCENARIO FOR DISCONTINUITIES IN HUMAN HISTORY [2002]
• Going Into The Water: A Survey Of Impact Events And The Coastal Peoples Of South-East North America [2002]
• Meteor Clue To End Of Middle East Civilisations [2002]
• Disaster That Struck The Ancients [2001]
• Update on Underwater Megalithic [2001]
• Comets, Meteors & Myth: New Evidence for Toppled Civilizations and Biblical Tales [2001]
• Slam, bang, thanks Saddam: new meteor theory [2001]

[SunkenCiv]

This topic was posted 7/11/2002, thanks again blam, just a two-list update.

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[M Kehoe]

“All we are is dust in the wind.”

5.56mm