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palaeoplain
palaeoplain n. 
/ˈpeɪlɪə(ʊ)pleɪn/,
Brit. /ˈpalɪə(ʊ)pleɪn/
, /ˈpalɪə(ʊ)pleɪn//ˈpeɪlɪə(ʊ)pleɪn/U.S. /ˈpeɪliəˌpleɪn/
Geomorphology a peneplain which existed at some time in the past and became overlain by other strata, being now buried or re-exposed./ˈpeɪliəˌpleɪn/ΘΚΠ
the world > the earth > land > landscape > level land > [noun] > level place or plain > peneplain
peneplain1889
palaeoplain1900
1900 R. T. Hill in Topogr. Atlas U.S. Geol. Surv. Folio 3. 5/3 Destructional plains are sometimes evolved from constructional plains; the latter, after elevation in long erosion, are reduced in old age to the former. On the other hand, constructional plains are usually established upon areas which were once destructional plains. Ancient buried destructional plains thus veneered by constructional formations might be appropriately termed paleoplains.
1966 Bull. Amer. Assoc. Petroleum Geologists 50 2302/2 Farther west along the flank of the Canadian shield..a vast paleoplain..was covered by Lower Cretaceous (locally Upper Jurassic) sediments which include a high percentage of sandstone which could serve as reservoir.
1996 Jrnl. Volcanol. & Geothermal Res. 70 107 The massive ignimbrite, generally about 15 m thick, covers a paleoplain throughout at least two thirds of its areal extent.
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