I agree with Fuzzy....it certainly looks like ash, on a number of counts.
One important issue.....in future, avoid cutting the logs up as thought they were being prepared for firewood, i.e. in pieces short enough for the fireplace. In a nutshell, wood loses moisture rapidly from its end grain, which is where most of the cracking will take place. When you buck your logs into short rounds, such as these, the cracks can soon render the whole piece unusable. If you keep the logs in good lengths and seal the ends to slow down the end-grain evaporation, you'll get considerably more usable timber out of them.
As a next step, cut the rounds along the length, down through the pith, then seal the end grain and the freshly sawn surface. Any old paint, wax, or PVA will do the job, just slow down the evaporation.
Les