Unless I am mistaken, Catholics accept evolution and the old earth evidence. They do not teach as literal an interpretation of the bible as others do.
So, could not the flood described in the Bible have been the Black Sea event some 7,000 years ago (I don't remember the exact date). I know this would be a more localized event, but would this not be a possible interpretation?
Apparently you've never read the decrees of the Pontifical Bible Comission.
You might correctly say many heretics parading around as Catholics teach evolution and symbolic interpretations of Genesis, ignoring the clear rulings of the Popes on these matters.
So, could not the flood described in the Bible have been the Black Sea event some 7,000 years ago (I don't remember the exact date). I know this would be a more localized event, but would this not be a possible interpretation?
No. The Bible clearly states the flood was worldwide and wiped out all men. The symbolism of this reality is important because in the Allegorical interpretation of Geneis, the Church holds the flood and the ark were types of Baptism and the Church, so that the souls in the Ark were saved by water, and the Ark is a type of the Church, where everyone outside the Catholic Church is overwhelmed by the flood of their sins. (See 1 St. Peter 3.20-21).
Jesus Christ Himself also clearly took the flood as literal truth (e.g. St. Matthew 24.36-39), and unless we are to attribute gross ignorance to Christ, which would de-divinize Him and thus destroy Orthodox Christianity, this is further evidence that it did happen.