Reconciling the statement of Allah the Exalted: “And the mountains were removed and became mirages” with His statement: “And you see the mountains, thinking them stationary”

Reconciling the statement of Allah the Exalted: “And the mountains were removed and became mirages” and His statement: “And you see the mountains, thinking them stationary”

The saying of Allah the Exalted: [Al-Naba: 20] ,And in the verse of Al-Naml: [Al-Naml: 88] How is the reconciliation between them?
Texts have been transmitted regarding the Last Day that differ in this and in other matters, even regarding the children of Adam, it is reported that they will be gathered blue, meaning: the criminals among them,And it was reported: [Al-Imran: 106] All of this does not contradict one another; because the duration of the Day of Resurrection is fifty thousand years, so conditions change, shift, and differ. And if we see that the weather differs in this world between evening and morning, between one day and another, between one week and another, between one month and another, and between the beginning and end of a year, then the mountains and conditions on the Day of Resurrection change from one state to another. Therefore, we say that all the texts regarding the Day of Resurrection that appear to contradict one another do not actually contain contradiction, but are understood as referring to the changing of conditions,Meaning: The duration of the Day of Resurrection is fifty thousand years.