"covered over" is correct and usable in written English.
You can use it when referring to something that is completely covered with a layer or substance. For example, "The paper was covered over with dirt."
All the old landmarks seemed to be covered over with superhighways.
Now it was covered over by another type of lichen, a different genus.
5 45 P.M. Put the skillet with the chicken (covered) over medium-low heat.
That grave site was reportedly covered over recently for a new luxury housing complex.
They get covered over by hoardings, and shame and scaffolding, locked to alien loves.
It's silver, and the rear wheels are covered over for extra streamlining.
Now, having covered over 4,000 miles, she is on the home stretch.
He said the church's sign was covered over during catered events.
He lay covered over in the bottom of the trench for a few days.
The site will be covered over again in October.
Also watching the time capsule being covered over was 11-year-old Aaron.
