From: henry@spsystems.net   
      
   In article ,   
   Eric Voisard  wrote:   
   >a lot of different DaG numbers. Some pieces are said to be lunar such as DaG   
   >262, some from Mars as DaG 489...   
   >Is it possible that in this "small" part of Lybia is a concentration of   
   >meteorites from Mars, the Moon and wherever else ?...   
      
   Almost certainly there's no concentration -- it's just a good place to   
   *look* for them.  There are a *lot* of meteorites on Earth; for example,   
   it's been estimated, if I recall right, that a couple of tons of Mars   
   rocks fall on Earth every year.  The trick is finding them.   
      
   What you want is a large area of bare surface where there's no vegetation   
   to hide small rocks, and where -- for one reason or another -- there   
   aren't very many Earth rocks confusing the picture.  Preferably a place   
   that's been stable for a long time, so there'll be many years'   
   accumulation of meteorites.  When such a place is identified, it tends to   
   get intensive attention from meteorite hunters, so an awful lot of the   
   known meteorites come from a few small areas of the world.   
      
   This doesn't mean that there aren't just as many elsewhere.  But in most   
   parts of the world, you can't find them unless you get lucky.   
   --   
   "Think outside the box -- the box isn't our friend."    |   Henry Spencer   
                                   -- George Herbert       | henry@spsystems.net   
      
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