Minerals with respect to a road deed with reversion

In old deeds, say to Caddo Co for example, a Landowner deeded for road purposes, with reversionary rights if not used for highway purposes, and they did not specifically reserve minerals, would it be safe to say they only transfered Surface ownership since they specifically called out "A strip of land 60’ wide followed by a M&B description. I have run across several of these some not to county where it specifies a strip of land. I know where I fall but want to hear you all’s ideas.

Brian

Grandma has some land S20-T03N-R7W:

After Rail Road line was discontinued: those Mineral Rights, reverted back to her estate.

Right, The question really is, since it was for a dedicated purpose in this example, exploration not being one of them, did they really receive any of the mineral rights?