The beautiful Monterey Formation at Montana de Oro State Park, San Luis Obispo, California, December 2013.  This 20 million year old rock, made up of ancient fossilized diatoms and silicon, has become the obsessive focus of fracking in recent years.

  • Pinterest

Comments

Sign in to comment

Win a Pair of Tickets to
the Del Mar Races

Join our newsletter list

Each newsletter subscription means another chance to win!

Close