Chile, South America is the source of beautiful Pliocene (2-6 million years old) and Miocene (15-23 million years old) fossils.

Miocene Fossil Formation - This is located in the area of the Phosphate mines in the high Atacama Desert, near the city of Copiapó.  The desert is bordered by the Coastal Mountain Range (on the west) and the Andes Mountains (on the east).  It is believed to have been an inland bay and is locally referred to as "Formación Bahía Inglesa" (English Bay Formation).  Many English language web sites refer to it as the "Huarra Formation" and call it Pliocene.  Given that Great White shark teeth are found there (a relatively new species), it is probably a combined fossil layer (Miocene and Pliocene).

You will notice a dark area just below the tops of the plateaus.  This is the exposed fossil layer, where the diggers find the shark teeth and other fossils.  Below is a close-up.

These Miocene fossils tend to be dark in color and often firmly attached to a rock-hard matrix.

Pliocene Fossil Formation - (Sorry no pictures.)  These areas are locally referred to as "Fossil Beaches" and are not as high in elevation as the Miocene areas described above.  They are thought to be an extension of the English Bay Formation, but from a newer (Pliocene) time period.  The matrix is more sandy and the fossils are lighter in color.  Also, the sandy matrix is generally not as firmly adhering as the rocky matrix in the Miocene desert areas.  Megalodon shark teeth (nearing extinction in the Pliocene) are less common in the "Fossil Beach" areas.
   

Chilean fossils at this web site come from multiple dig sites.  Recovering them is hard work, often in firm matrix and far from roads.  The Atacama Desert is actually one of the driest places on Earth.  It is used to simulate the surface of other worlds, for testing planetary roving vehicles.

Here is a link to some fossil Great White shark teeth at this web site.  On that page, you will finds nice examples of teeth that are over 2 inches (from sharks around 20 feet long).