Green-dot,
Get a bucket, fill it with water. Get a spoon full each of sand, potting soil, metal filings from drilling or a lathe. Drop the sand in 3 cm from the center. Drop the metal filings in the center. Drop the potting soil in 3 cm the other side of center.
Now imagine the results of dropping those items into a 4000 meter column of water.
I think you can imagine your way to an answer for your question. (They are neatly sorted by the rate at which they fall more than anything else by the various currents they fell through. Note that the debris field is WAY larger than the plane's size.