Examples from the Web for superjacent
When the normal tissue was not injured I never saw any that were not superjacent and could not easily be peeled off (croupous).
A root which was exposed to view, through the washing away of the superjacent soil, measured 110 feet in length.The Desert World|Arthur Mangin
The superjacent skin is tense and glistening, and the surrounding veins are more or less distended.
We must not think, however, that all earth containing this ferment is capable of poisoning the superjacent atmosphere.