More information: Stephanie R. Killingsworth et al, Marine strontium isotopes preserved in fossil shark teeth calibrate Neogene land mammal evolution, Palaeogeography, Palaeoclimatology ...

Our study was one of the first to date Florida coastal deposits using fossil shark teeth and a technique that ... the age of the sites based only on mammal fossils. The sites were thought to ...

A paleontologist holds a megalodon fossil tooth. Credit: Kristen Grace/FLMNH ... scientists could estimate the age of the sites based only on mammal fossils. The sites were thought to be the ...

The ratios of strontium isotopes in fossil shark teeth can be used to better understand ... scientists could estimate the age of the sites based only on mammal fossils. The sites were thought ...

The ratios of strontium isotopes in fossil shark teeth can be used to better understand ... scientists could estimate the age of the sites based only on mammal fossils. The sites were thought ...

MacFadden, University of Florida (THE CONVERSATION) The ratios of strontium isotopes in fossil shark teeth can be used to ... age of the sites based only on mammal fossils. The sites were thought ...