In Final Fantasy IX (12), how can i find the entrance to the Henne Mines?

I got to the area of Ozmone Plains, and got to an area in this plain known as 'The Shred'. I think this is where the mines is, but HOW can i get cross to the other side of this area? There is no page that leads to the other side of the area. Even i rode on a Chocobo, I still cannot find any page to the other side, (an imperial in the entrance to the Golmore Jungle told me that there are Chocobo footprints that lead to the entrance to the Henne Mines but i can't see those footprints)! So can anyone who is already ahead of me in this game help me with this. Oh yeah, I'm now searching for a Viera named Mjrn,