Beautiful 1.8 Inch Hooked Mako Fossil

Here is a nicely preserved hooked Mako tooth (Isurus planus) found at Sharktooth Hill near Bakersfield, CA. It's 1.81 inches in length and displays beautiful coloration. Quite impressive for a tooth thats 15 million years old.

The exact classification of these teeth has been hotly debated for several decades. Historically, these teeth have been classified as a mako shark (Isurus planus or Cosmopolitodus planus) but more recent research has suggested they fall into the white shark lineage (Carcharodon planus), You can read more about this here.

About Sharktooth Hill

Sharktooth Hill is located in the foothills of the Sierra Nevada Mountains near Bakersfield, California. It represents an exposure of the Temblor Formation, a middle-Miocene marine deposit. 15 million years ago the sea levels were substantially higher, and central California was covered by what is known as the Temblor Sea.

Two highly fossiliferous bone beds in the formation were created when fossils originally deposited at the bottom of the sea eroded out of the rocks, were concentrated by ocean currents, and subsequently reburied. Because the fossils in these bone beds are reworked, only isolated teeth and bones are found in these beds.

Today, the original Sharktooth Hill is a National Natural Landmark, but private property surrounding it contains operational pay-to-dig fossil quarries.