Carbon-14 Dating - What Do We Know?
http://edu-observatory.org/olli/CosmicRays/Week3.html   or   index.html




Lewis and Clark Expedition, also known as the Corps of Discovery Expedition
  https://en.wikipedia.org/wiki/Lewis_and_Clark_Expedition
  https://upload.wikimedia.org/wikipedia/commons/c/c0/Carte_Lewis_and_Clark_Expedition.png
  LCT.png

Schultz Saddle and "The Fort" Prehistoric
  Schultz_Saddle2.png
  o45113g7-fort.gif




Why does carbon dating detect when things were alive? How are
the atoms in living things any different from the atoms in
dead things?
  http://www.askamathematician.com/2013/12/q-why-does-carbon-dating-detect-when-things-were-alive-how-are-the-atoms-in-living-things-any-different-from-the-atoms-in-dead-things/


  

  

Carbon-14 Dating
  https://www.nde-ed.org/EducationResources/CommunityCollege/Radiography/Physics/carbondating.htm

Wikipedea | Carbon-14
  https://en.wikipedia.org/wiki/Carbon-14

  The primary natural source of carbon-14 on Earth is cosmic
  ray action on nitrogen in the atmosphere, and it is
  therefore a cosmogenic nuclide. However, open-air nuclear
  testing between 1955-1980 contributed to this pool. 

  

The Cosmic Story of Carbon-14
  http://scienceblogs.com/startswithabang/2012/06/04/the-cosmic-story-of-carbon-14/

 
    sam.wormley@gmail.com