When the other scrolls were discovered the interest of the archaeologists reached its peak and during those same years when they were looking for some evidence related to habitation that would lead them to the history of the scrolls giving them the knowledge of the people who deposited the scrolls there and their origin, they came across the site of the Qumran ruin and unearthed it
The Qumran Ruin located on an infertile terrace between the cliffs where the caves are found and the Dead Sea is a complex of structures. This discovery opened further horizons and within a very short period the historical, paleographic, and linguistic evidence, as well as carbon-14 dating, revealed the fact that the scrolls and the Qumran ruin dated from the third century B.C.E. to 68 C.E. This was a huge discovery that unveiled the fact that the scrolls were antediluvian with their origins lying in the late Second Temple Period which was a time when Jesus of Nazareth lived. This further proved that they were almost one thousand years older than any other surviving biblical manuscripts.
What destroyed Qumran and how the scrolls were preserved till today .
The answer to the query as to what destroyed Qumran that is related to the scrolls lies in the Bible's description, in Genesis 19. It speaks of a destructive earthquake near the Dead Sea area during the time of Abraham that destroyed the cities of Zeboim, Admah, Bela or Zoar, Sodom, Gomorrah, Masada, Ein Gedi, and Qumran. The remains of Zeboim, Admah, Bela or Zoar, Sodom, Gomorrah have not been found and it is believed that they are beneath the waters at the southern end of the sea. The rest have been found and Qumran is where the scrolls were discovered.
It is miraculous that after so many thousands years the scrolls were still intact. The answer to it lies in the location and climate of the Dead Sea that is very unique in nature. The cause for an unusual climate of the area is the low elevation of the sea and its position in a deep basin.