Shark tooth ID please

[Lone Hunter]

Found this little guy in piece of marl I was fixing to chunk until I noticed all the little black dots.  Almost have it out but decided to leave it since it's so small, hope it's enough for ID.  On the flip side of tooth is another object, about same size, before I bother cleaning anymore thought I'd see if it's anything, looks like it should be  Tooth was in same Eagle Ford marl as the bivalves shown.

[bthemoose]

Looks like a sand tiger of some sort, but hopefully someone more familiar with the fauna can get you a better ID.