Is this a coprolite?

When I was young I remember being disgusted AND appalled by a boyfriend’s collection of smallish coprolites. Eeew. Then at the other end of life I acquired this intriguingly striated rock, I just picked it up off of the earth. Well, it is huge and it looks like elephant poop (compare at http://www.malawihf.org/wp-content/uploads/2014/06/olifantenpoep.jpg), but it is fossilized so I wonder if I have acquired a woolly mammoth coprolite? Woolly mammoths lived from a quarter of a million years ago, until about 10,000 years ago in North America.

I am flummoxed at how much I have changed over the course of my life, that I am delighted to possess this geological marvel.

Caption: Is this a coprolite?

Whatever it is, it is currently owned by Annmarie Throckmorton 2014.