References

• INTERNATIONAL CHRONOSTRATIGRAPHIC CHART
• Moh's Hardness Scale
• Paleobiology Database (Search Fossil Sites & Taxa)
  https://paleobiodb.org/
  NOAA Historical Weather Data Archive
  https://www.ncei.noaa.gov/
  Library of Congress — Historic Maps & Geological Charts
  https://www.loc.gov/maps/
  Earth Observatory (NASA Geoscience Imagery)
  https://earthobservatory.nasa.gov/
  Encyclopedia of Life (Species-Level Reference)
  https://eol.org/
  Smithsonian Archives – Field Expeditions & Fossil Prep
  https://siarchives.si.edu/
  National Academies Scientific Publications
  https://nap.nationalacademies.org/