"overlain" is correct and usable in written English.
You can use it when you are referring to something being positioned over or covering something else. For example, "The new layer of paint overlain the old paint."
As originally described, the Cambrian System was overlain by the Silurian System, which was named, also in 1835, by Scottish geologist Roderick I. Murchison.
In western Zambia they are overlain by younger sandy deposits, relicts of a once more-extensive Kalahari desert.
It overlies rocks from the Pliocene Epoch (5.3 million to 2.6 million years ago) and is itself overlain by rocks of the Holocene Series (from 11,700 years ago to the present); together these two latter divisions make up the Quaternary System.
The region is overlain by a mantle of fine-grained, wind-deposited, yellowish alluvium known as loess, which is also carried in suspension by the Huang He.
The evidence suggests it has a nickel-iron core like the Earth's, overlain by a rocky mantle.Part of that evidence comes from its density and part from hundreds of chunks of rock, in the form of meteorites, that have been examined by Earth-bound scientists.
The Kasimovian Stage is underlain by the Moscovian Stage and overlain by the Gzhelian Stage of the Pennsylvanian Subsystem.
In 1986 Raymond Lafontaine, a Canadian art conserver, outlined how shining coloured light at a painting could counteract the effects of yellowish varnish overlying the image.
Where these abut, the smooth one appears to overlie the rough.
Luvisols are technically characterized by a surface accumulation of humus overlying an extensively leached layer that is nearly devoid of clay and iron-bearing minerals.
The subsiding air warms by compression and, coupled with cooling of the lowest layers overlying the cold ocean currents normally found off the west coasts of the continents, forms a pronounced temperature inversion (warm air over cold), called the trade-wind inversion.
This water, overlying the continental shelf, frequently has a southerly flow, counter to that of the Florida Current.
