Looks like one but hard to tell from the photo. You might try photographing it under darker conditions (after sunset) and hit it with a bright flashlight from different angles. I'm no expert but I found a small track here in NJ recently and have done a lot of research. One thing to look for is the banding of the rock layers; a track would lay even with a layer of rock, not go against or perpendicular to it (you may know this already). Have you found other tracks in the same formation?