De Moor's Theological Disputation on Mark 15:25 and John 19:14: The Chronological Paradox

There is a very famous ἐναντιοφανὲς, apparent contradiction, that occurs in the History of the Lord’s Passion, if you compare Mark with John in the placement of a certain fixed point of time regarding the Passion of the Lord.  Namely, Mark in the narration of those things that the Lord suffered on Golgotha, has in Mark 15:25, ἦν δὲ ὥρα τρίτη, καὶ ἐσταύρωσαν αὐτόν, and it was the third hour, and they crucified Him.  But John, being about to exhibit the final scene that Pilate acted out with the Lord, and in which he next delivered Him to be crucified, notes in John 19:14, ἦν δὲ Παρασκευὴ τοῦ πάσχα, ὥρα δὲ ὡσεὶ ἕκτη, and it was the preparation of the Passover, and about the sixth hour.  But, if it were already roughly the Sixth Hour, when Pilate condemned our Lord to death, in what manner was Mark able to make mention of the Third Hour when he is in the relation of the history of the suffering of the Cross, which Christ afterwards suffered on Mount Golgotha?