Nano-diamond dust you walk on past comet history

leonids-comet-shower
Soil rich in diamond dust has been discovered across North America from Oregon to the Carolinas and up to Canada. These nanometer-sized diamonds are produced under high temperatures and high pressure from meteorite impacts. These sediments full of nano-diamond dust were found at digs sites in Bull Creek, Oklahoma; Gainey, Michigan; and Topper, South Carolina in the United States and Lake Hind, Manitoba; and Chobot, Alberta in Canada.
Nanodiamonds can only be made on Earth as a resault of high-explosive detonations or chemical vaporization. which gives credence to  a theory that falling meteors caused the extinction of mammoths and other animals,(Journal Science)
“…A cosmic impact event at approximately 12,900 years ago that would have had enormous environmental consequences for plants, animals and humans across North America,” said Douglas Kennett of the University of Oregon, who led the research.

This could give support for the idea  that 1,300-year-long ice age, causing the extinction of several species of animals and fragmented the prehistoric human Clovis culture. One of the diamond-rich sediment layers found by the researchers is located directly above Clovis materials at a site in Murray Springs, Arizona, said Kennett.  The Clovis people lived off of hunting and gathering in an area across what is now the United States, Mexico and Central America.
The peak of the Clovis era was from 13,200 to 12,900 years ago and scientists say the Clovis may have entered North America across a land bridge from Siberia.

The sediments full of diamond dust were also found at digs at five other sites, in Bull Creek, Oklahoma; Gainey, Michigan; and Topper, South Carolina in the United States and Lake Hind, Manitoba; and Chobot, Alberta in Canada.
Resources

Journal Science, January 2, 2009 as referenced in
http://news.yahoo.com/s/afp/20090105/sc_afp/sciencemeteorsarchaeology;_ylt=Aj.7YDcTSZtVCy14LcshQ6gPLBIF

Image courtesy of
http://www.nasm.si.edu/ceps/etp/comets/cometimg/leonids.gif

The stars here have colored streaks, whereas the meteors that cross the star trails show areas of different brightness.

Advertisements

Leave a Reply

Please log in using one of these methods to post your comment:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

%d bloggers like this: