09 ch04originoflife2008
Impact Craters
Structural character of the terrace zone and implications for crater formation: Chicxulub impact crater David L. Gorney Sean Gulick Gail Christeson GSA.
FOSSILS!. What is a Fossil? A fossil is any evidence of prehistoric life. Must be older than 10,000 years but can be up to billions of years old. Can.
FOSSILS!
