unconformably

Then the edges of the old red sandstone were eaten away by the sea -- and some think by ice too, in some earlier age of ice; and then the limestone coral reef was laid down on them, "unconformably," as geologists say -- just as you saw the new red sandstone laid down on the edges of the limestone; and so one world is built up on the edge of another world, out of its scraps and ruins.

Madam How and Lady Why

It is formed by the relatively resistant quartz sandstone of the Middle Proterozoic Kombolgie Formation unconformably overlying less resistant rocks.

Kakadu National Park, Australia

The elliptical 5x7-km mountain consists of submarine and subaerial basaltic lavas and siltstones unconformably overlying Precambrian schists.

Granophyre.html

Hitherto no fossils have been obtained from these beds save some obscure plant-like markings, but they are evidently a continuation southwards of the sandstones of Hoy, which there rest unconformably on the flagstone series of Orkney.

Encyclopaedia Britannica, 11th Edition, Volume 4, Part 4 "Bulgaria" to "Calgary"

Throughout its whole length, three distinct geological formations may be traced, the two lower of which have followed in immediate succession, and are conformable with one another, while the third rests unconformably upon them, following all the inequalities of the greatly denudated surface presented by the second formation.

The Atlantic Monthly, Volume 18, No. 105, July 1866

The Chalk again is vertical on the flanks of the Pyrenees, and the tertiary strata repose unconformably upon it.

The Harvard Classics Volume 38 Scientific Papers (Physiology, Medicine, Surgery, Geology)

The Oceanic series is generally overlaid directly, and unconformably, by coral limestones; but at Bissex Hill, at the base of the coral limestones, and resting unconformably upon the

Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 3 "Banks" to "Bassoon"

Radiolarian cherts are covered unconformably by conglomerates (Bennan Hill near Straiton and Kennedy's Pass) which are associated with limestones of

Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 1 "Austria, Lower" to "Bacon"

One is that described above, in which a certain series of beds having been raised out of their natural horizontal position, another series has been deposited upon them, thus resting unconformably above.

The Atlantic Monthly, Volume 12, No. 69, July, 1863

There can be no question that this more recent formation rests unconformably upon the sandstone beds beneath it; for it fills all the inequalities of their denudated surfaces, whether they be more or less limited furrows, or wide, undulating depressions.

The Atlantic Monthly, Volume 18, No. 106, August, 1866