Chesapeake  - the very large Chesapeake Bay impact crater of 35 million years ago click here

 Toms Canyon - a possible impact off New Jersey possibly related to Chesapeake  click here

  Popigai - the even larger impact crater in northern central Russia click here

 Tektites - various properties of the tektites  click here

  Craters - craters of interest click here

  Impactors - what happens when a very large rock moving very quickly hits a planet  click here

  References - some additional reading materials click here