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Re: protect-earth-from-asteroids

Cross-posted to 4 groups.

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"J. Clarke" <j.clarke.873638@gmail.com> wrote:

>> Lesser impacts have caused widespread, if not actually global, damage. A 
>> meteor could easily take out an entire city, killing millions of people.
>
>It could do worse than that.  
>Take a look at 51° 19.744' N  68° 41.193' W in Google Earth.  That 
>feature, roughly 60 miles in diameter, is a 200 million year old meteor 
>crater.
>
>Imagine if that hit, say, Hartford.  Hartford goes, and Springfield, and 
>New Haven, and while they aren't actually going to be inside the crater, 
>New York and Boston are both going to pretty much cease to exist, and 
>most of the east coast is going to be in much the same condition as it 
>might be after a nuclear attack, minus the radiation.
>
>And it gets worse--there's reason to believe that it was a multiple 
>impact with addtional strikes in France, Ukraine, North Dakota, and 
>Manitoba.

Wikipedia says it's the SIXTH largest such crater, though it's the
largest easily visible one.  When I entered the co-ordinates into
google maps, I had to back out three times before the structure became
visible.

The Manicouagan wiki page says "It was once thought to be associated
with the end-Carnian extinction event."

but the Carnian page says "Its boundaries are not characterized by
major extinctions or biotic turnovers, "

So was there or was there not an extinction event at the end of the
Carnian, before we can assign it to the Manicouagan and friends
impacts.
-- 
We are geeks.  Resistance is voltage over current.

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Thread

protect-earth-from-asteroids The Starmaker <starmaker@ix.netcom.com> - 2016-01-12 08:47 -0800
  Re: protect-earth-from-asteroids David Staup <dstaup@charter.net> - 2016-01-12 11:44 -0600
  Re: protect-earth-from-asteroids The Starmaker <starmaker@ix.netcom.com> - 2016-01-13 11:12 -0800
  Re: protect-earth-from-asteroids Sylvia Else <sylvia@not.at.this.address> - 2016-01-14 11:06 +1100
    Re: protect-earth-from-asteroids benj <none@gmail.com> - 2016-01-13 19:19 -0500
    Re: protect-earth-from-asteroids "J. Clarke" <j.clarke.873638@gmail.com> - 2016-01-13 20:36 -0500
      Re: protect-earth-from-asteroids The Starmaker <starmaker@ix.netcom.com> - 2016-01-13 23:05 -0800
      Re: protect-earth-from-asteroids Greg Goss <gossg@gossg.org> - 2016-01-14 04:59 -0700
      Re: protect-earth-from-asteroids The Starmaker <starmaker@ix.netcom.com> - 2016-01-14 11:55 -0800
        Re: protect-earth-from-asteroids Lynn McGuire <lmc@winsim.com> - 2016-01-14 15:15 -0600
          Re: protect-earth-from-asteroids The Starmaker <starmaker@ix.netcom.com> - 2016-01-14 14:05 -0800
            Re: protect-earth-from-asteroids Lynn McGuire <lmc@winsim.com> - 2016-01-14 19:27 -0600
              Re: protect-earth-from-asteroids The Starmaker <starmaker@ix.netcom.com> - 2016-01-14 18:17 -0800
                Re: protect-earth-from-asteroids The Starmaker <starmaker@ix.netcom.com> - 2016-01-14 22:14 -0800
            Re: protect-earth-from-asteroids The Starmaker <starmaker@ix.netcom.com> - 2016-01-15 22:45 -0800
  Re: protect-earth-from-asteroids jamesl51165@gmail.com - 2016-01-14 17:38 -0800

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