The Hydroplate Theory explains this quite well.
I did some study of the hydroplate theory years ago and found the theory interesting and compelling. I even bought an excellent book by Walt Brown and donated it to the school science class at our Christian school. I was very impressed with Dr. Brown, a West Point graduate (I visited West Point as a prospective cadet when I was a student at USMAPS) and find I still enjoy what I read about graduates there. For example, I love the fact that Mike Pompeo graduated at the top of his class from West Point.
I am also impressed that Dr. Brown got his Ph.D. from MIT and taught science at the Air Force Academy.
Unfortunately, like Joe Biden, my mind is slowly beginning to deteriorate, and I cannot remember everything I once learned.