Maastrichtianadj.n.

Brit.

/mɑːˈstrɪktɪən/, U.S.

/mɑˈstrɪktiən/

Forms: 1800s– Maestrichtian, 1900s– Maastrichtian.

Origin: A borrowing from French. Etymon: French maestrichtien.

Etymology: < French maestrichtien (A. Dumont 1849, in Bull. de l'Acad. Royale des Sci. de Belgique 16 ii. 360) < Maestricht (now Maastricht Maastricht n., whence the 20th-cent. respelling) + -ien -ian suffix.

Geology.

A. adj.

Of, relating to, or designating a division of the Upper Cretaceous in Europe that is now regarded as the most recent stage of the Cretaceous, lying next below the Danian of the Tertiary.

ΘΚΠ

the world > the earth > structure of the earth > age or period > stratigraphic units > [adjective] > secondary or Mesozoic > Cretaceous > specific

Wealden1828

Speeton1829

Neocomian1843

Albian1846

Senonian1850

Urgonian1856

Santonian1869

Maastrichtian1885

Valanginian1885

Vectian1885

Barremian1903

1885 A. Geikie Text-bk. Geol. (ed. 2) 834 In the Cotentin, a limestone with Baculites anceps, Scaphites constrictus, and other fossils has been paralleled with the Maestricht chalk (Maestrichtian sub-stage).

1967 D. H. Rayner Stratigr. Brit. Isles x. 337 Maastrichtian chalk is rare in Britain but small remnants of the lower zone (Belemnitella lanceolata) are known from the Norfolk coast and north-eastern Antrim.

1971 Nature 19 Feb. 553/2 Although disputed by some, the latest Cretaceous and earliest Tertiary (Maestrichtian and Danian stages) have generally been recognized as a brief interval during which many organisms underwent a severe attenuation in diversity or became extinct.

1992 Christie's Internat. Mag. June 100/3 (caption) The fossilised egg of a dinosaur, probably of the great sauropod dinosaur Hypselosaurus, of the Maastrichtian period.

B. n.

The Maastrichtian stage or age. Usually with the.

ΘΚΠ

the world > the earth > structure of the earth > age or period > stratigraphic units > [noun] > secondary or Mesozoic > Cretaceous > specific

gault1575

weald clay1822

Wealden1828

Neocomian1845

Washita1860

Albian1863

Fairlight clays1874

Maastrichtian1931

1931 J. W. Gregory & B. H. Barrett Gen. Stratigr. xi. 171 The Senonian deposits in the N.E. of France and Belgium were those of a shallow sea, such as the phosphatic chalks of the Campanian and the limestone ‘tuffau’ of the Maastrichtian.

1975 Nature 6 Mar. 50/1 By about 70 Myr ago (late Cretaceous: Maastrichtian) there seems to have been a gap large enough to have prevented east–west migration of marine reef colonies.

1998 Science 18 Dec. 2199/3 This period of sustained warmth was followed by long-term cooling through the Maastrichtian, which yields the lowest temperatures of the Cretaceous.

This entry has been updated (OED Third Edition, March 2000; most recently modified version published online March 2022).

单词	maastrichtian
释义	Maastrichtianadj.n. Brit. /mɑːˈstrɪktɪən/, U.S. /mɑˈstrɪktiən/ Forms: 1800s– Maestrichtian, 1900s– Maastrichtian. Origin: A borrowing from French. Etymon: French maestrichtien. Etymology: < French maestrichtien (A. Dumont 1849, in Bull. de l'Acad. Royale des Sci. de Belgique 16 ii. 360) < Maestricht (now Maastricht Maastricht n., whence the 20th-cent. respelling) + -ien -ian suffix. Geology. A. adj. Of, relating to, or designating a division of the Upper Cretaceous in Europe that is now regarded as the most recent stage of the Cretaceous, lying next below the Danian of the Tertiary. ΘΚΠ the world > the earth > structure of the earth > age or period > stratigraphic units > [adjective] > secondary or Mesozoic > Cretaceous > specific Wealden1828 Speeton1829 Neocomian1843 Albian1846 Senonian1850 Urgonian1856 Santonian1869 Maastrichtian1885 Valanginian1885 Vectian1885 Barremian1903 1885 A. Geikie Text-bk. Geol. (ed. 2) 834 In the Cotentin, a limestone with Baculites anceps, Scaphites constrictus, and other fossils has been paralleled with the Maestricht chalk (Maestrichtian sub-stage). 1967 D. H. Rayner Stratigr. Brit. Isles x. 337 Maastrichtian chalk is rare in Britain but small remnants of the lower zone (Belemnitella lanceolata) are known from the Norfolk coast and north-eastern Antrim. 1971 Nature 19 Feb. 553/2 Although disputed by some, the latest Cretaceous and earliest Tertiary (Maestrichtian and Danian stages) have generally been recognized as a brief interval during which many organisms underwent a severe attenuation in diversity or became extinct. 1992 Christie's Internat. Mag. June 100/3 (caption) The fossilised egg of a dinosaur, probably of the great sauropod dinosaur Hypselosaurus, of the Maastrichtian period. B. n. The Maastrichtian stage or age. Usually with the. ΘΚΠ the world > the earth > structure of the earth > age or period > stratigraphic units > [noun] > secondary or Mesozoic > Cretaceous > specific gault1575 weald clay1822 Wealden1828 Neocomian1845 Washita1860 Albian1863 Fairlight clays1874 Maastrichtian1931 1931 J. W. Gregory & B. H. Barrett Gen. Stratigr. xi. 171 The Senonian deposits in the N.E. of France and Belgium were those of a shallow sea, such as the phosphatic chalks of the Campanian and the limestone ‘tuffau’ of the Maastrichtian. 1975 Nature 6 Mar. 50/1 By about 70 Myr ago (late Cretaceous: Maastrichtian) there seems to have been a gap large enough to have prevented east–west migration of marine reef colonies. 1998 Science 18 Dec. 2199/3 This period of sustained warmth was followed by long-term cooling through the Maastrichtian, which yields the lowest temperatures of the Cretaceous. This entry has been updated (OED Third Edition, March 2000; most recently modified version published online March 2022). < adj.n.1885
随便看	forum-area forum-orator forum-shop forumarea forumorator forums forumshop forvay forvaying forwake forwaked forwal forwalk forwalked forwall forwallowed forwander forwandered forward forward batsman forward block forward cut forward defence forward difference forward drive