Hi, @bradley-meyers – you can use Macrostrat to get a better idea of the age of the rock: https://macrostrat.org/map/#/z=10.6/x=-82.3217/y=29.7107/bedrock/lines/ just find the locality you were at and click!

Do you have an image of the other side of the specimen you could upload?

Talk to you soon, Jen

Hi, @bradley-meyers – do you have a photo of the other side of the tooth you could upload? That will help our experts confirm your fossil identification! Talk to you soon, Jen

Hi, @bradley-meyers – this is not a horse tooth but rather a ray plate. Your classification is very incorrect.
Kingdom Animalia > Phylum Chordata > Class Chondrichthyes > Order Myliobatiformes.