Noun, : English has a Norman-French superstratum.    From Dictionary.com. 

The whole superstratum, which is oftentimes many feet in thickness, consists of the debris of vegetable and animal matter; for these swamps are scarcely more noted for their luxuriant vegetation, than they are for their abundance of insects and reptiles.    From Wordnik.com.  [An Address before the Medical Society of North Carolina, at Its Second Annual Meeting, in Raleigh, May 1851, by Charles E. Johnson, M.D.] Reference

A plain which lay between us and the sea appeared to consist of barren sand, covered towards the sea with a superstratum of salt.    From Wordnik.com.  [Travels in Nubia] Reference

The formation of Israeli was NOT the result of language contact between spoken Hebrew and a powerful superstratum, such as English in the case of some vernacular Arabics, Kurdish in the case of Neo-Aramaic, or French in the case of English.    From Wordnik.com.  [languagehat.com: HEBREW OR ISRAELI?] Reference

Like in France, where the result of the contact of Gaulish Latin, as a spoken substratum, with superstratum Frankish only surfaced in writing in the ninth century after the Carolingian Reform, it needed a strong external impetus to adjust the written language to the spoken practice.    From Wordnik.com.  [languagehat.com: FREE HIGHBEAM TRIAL.] Reference

Beneath the superstratum of mud you come to stone.    From Wordnik.com.  [The Fashion in Shrouds]

Natural instinct is not much disturbed in the human brain by what may happen in that thin superstratum of ideas which commonly overlays it.    From Wordnik.com.  [The Life of Reason] Reference

Anne said little to all these things, and preserved a superstratum of calmness on her countenance; but some inner voice seemed to whisper to her that Bob was no more.    From Wordnik.com.  [The Trumpet-Major] Reference

The superstratum of timidity which often overlies those who are daring and defiant at heart had been passed through, and the mettlesome substance of the woman was reached.    From Wordnik.com.  [The Return of the Native] Reference

I therein said that I should visit these hills on my way down the river; and I am fully convinced from close examination, that they are a part of the same original superstratum, which I therein described, though 7 or 800 miles separated from them.    From Wordnik.com.  [Journals of Expeditions of Discovery into Central Australia and Overland from Adelaide to King George's Sound in the Years 1840-1: Sent By the Colonists of South Australia, with the Sanction and Support of the Government: Including an Account of the Manners and Customs of the Aborigines and the State of Their Relations with Europeans — Complete] Reference

I therein said, that I should visit these hills on my way down the river; and I am fully convinced, from close examination, that they are a part of the same original superstratum, which therein described, though seven or eight hundred miles separated from them.    From Wordnik.com.  [Letters and notes on the manners, customs, and conditions of the North American Indians] Reference

Another now-familiar feature, a wood-fired oven, turns out a pair of pizzas-a burrata margherita and a tarte flambée whose Pleasant Ridge Preserve cheese-bacon-onion funk is softened by creme fraiche-with superthin crusts jacketed by a superstratum of ethereal crispiness.    From Wordnik.com.  [Chicago Reader] Reference

She had watched these operations, fascinated, for, possibly, a full half hour, despite the discomfort of damp clothing, which had begun to chill her, when she saw signs of violent excitement on the old man's face and in his actions, after he had chipped a rock, from which he first had had to scrape a thin superstratum of light soil.    From Wordnik.com.  [In Old Kentucky] Reference

Yiddish, most revivalists' máme lóshn (mother tongue, is the ‘substratum', whilst Hebrew is only a ‘superstratum' providing lexicon and frozen morphology (cf.    From Wordnik.com.  [languagehat.com: HEBREW OR ISRAELI?] Reference

The superstratum which will overlay us.    From Wordnik.com.  [Don Juan] Reference