Fossil sighting among ancient sea floor walls

We will undertake a trek of approximately 2 hours in total to find fossils that are 160 million years old, from the Jurassic era of prehistory, in an undisclosed location within the Cajón del Maipo.
These first traces of fossils are of the ammonite type. We will walk between walls that were once under the sea and are now one of Santiago's most famous climbing areas.