Neocomianadj.n.

Brit.

/ˌniːə(ʊ)ˈkəʊmɪən/, U.S.

/ˌnioʊˈkoʊmiən/

Forms: also with lower-case initial.

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

Etymology: < French Néocomien (J. Thurmann Essai sur les soulèvemens jur. du Porrentruy (1832)) < post-classical Latin Neocomium ( < ancient Greek νέος new (see neo- comb. form) + κώμη village (see Comarch n.) + -ium -y suffix⁴), Latinized form of Neuchâtel , the name of a city in the Jura mountains of Switzerland + French -en -an suffix.

Geology.

A. adj.

Of, relating to, or designating the oldest part of the Lower Cretaceous period, or the series of rocks laid down at that time (originally spec. in Switzerland and France).

ΘΚΠ

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

Neocomian1843

Santonian1869

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

1843 Proc. Geol. Soc. 4 i. 170 Argillaceous (Neocomian of Leymerie and D'Orbigny).

1863 C. Lyell Geol. Evid. Antiq. Man xvi. 335 The lower cretaceous or neocomian beds were deposited conformably on the oolitic.

1888 J. Prestwich Geol. II. 266 Strata of..Neocomian age.

1891 Edinb. Rev. July 177 The neocomian sandstone in the Lebanon.

1936 Science 14 Feb. 164/2 The similarity of certain faunal elements in the Upper Jurassic and Neocomian sediments of California and Northern Mexico suggests that seas which occupied these geosynclines were at times connected across northern Mexico.

1988 Nature 4 Feb. 433/2 The faunal and floral assemblage from Las Hoyas seems..very similar to that of the classic Neocomian outcrops of Montsec.

1999 Bull. Amer. Assoc. Petroleum Geologists 83 1502/1 Synrift, lacustrine sedimentation took place along the entire eastern Brazilian margin in response to the Neocomian breakup of Gondwana.

B. n.

Frequently with the. The Neocomian period; the series of rocks laid down during this time.Now usually held to include the Berriasian, Valanginian, and Hauterivian stages of the Cretaceous (between approx. 144 and 125 million years ago) but sometimes applied to greater or lesser extents of the Cretaceous (see quot. 1982).

ΘΚΠ

the world > the earth > structure of the earth > age or period > [noun] > secondary or Mesozoic > Cretaceous > Cretaceous spec.

Neocomian1845

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

1845 R. I. Murchison et al. Geol. Russia in Europe I. xii. 260 The lowest Greensand of English geologists..with its continental equivalent the Neocomian must be considered the true base of the Cretaceous system.

1872 Philos. Trans. (Royal Soc.) 162 37 Cryptocoenia has hexameral types in the Neocomian and in the Middle and Inferior Oolites.

1888 J. Prestwich Geol. II. 267 At the close of the Lower Neocomian.

1966 McGraw-Hill Encycl. Sci. & Technol. (rev. ed.) III. 543/2 During the Neocomian, the Tethys and Northern seas may have been connected by a strait through Poland.

1982 W. B. Harland et al. Geologic Time Scale ii. 30/2 Ever since Thurmann..coined the name Neocomian for strata in the vicinity of Neuchâtel, Switzerland, there has been confusion as to how much of the early Cretaceous Period should be embraced by the name. Some authors have used it to signify earliest Cretaceous up to and including the Valanginian Age; others have extended it to include the Barremian and even Aptian. We have followed the recommendation of Barbier, Debelmas and Thieuloy in the Colloque sur la Crétacé inférieur..that the Neocomian be regarded as an informal term embracing the lowest three stages of the Cretaceous, i.e. Berriasian, Valanginian and Hauterivian.

This entry has been updated (OED Third Edition, September 2003; most recently modified version published online March 2022).

单词	neocomian
释义	Neocomianadj.n. Brit. /ˌniːə(ʊ)ˈkəʊmɪən/, U.S. /ˌnioʊˈkoʊmiən/ Forms: also with lower-case initial. Origin: A borrowing from French. Etymon: French Néocomien. Etymology: < French Néocomien (J. Thurmann Essai sur les soulèvemens jur. du Porrentruy (1832)) < post-classical Latin Neocomium ( < ancient Greek νέος new (see neo- comb. form) + κώμη village (see Comarch n.) + -ium -y suffix⁴), Latinized form of Neuchâtel , the name of a city in the Jura mountains of Switzerland + French -en -an suffix. Geology. A. adj. Of, relating to, or designating the oldest part of the Lower Cretaceous period, or the series of rocks laid down at that time (originally spec. in Switzerland and France). ΘΚΠ the world > the earth > structure of the earth > age or period > [adjective] > secondary or Mesozoic > Cretaceous > specific Neocomian1843 Santonian1869 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 1843 Proc. Geol. Soc. 4 i. 170 Argillaceous (Neocomian of Leymerie and D'Orbigny). 1863 C. Lyell Geol. Evid. Antiq. Man xvi. 335 The lower cretaceous or neocomian beds were deposited conformably on the oolitic. 1888 J. Prestwich Geol. II. 266 Strata of..Neocomian age. 1891 Edinb. Rev. July 177 The neocomian sandstone in the Lebanon. 1936 Science 14 Feb. 164/2 The similarity of certain faunal elements in the Upper Jurassic and Neocomian sediments of California and Northern Mexico suggests that seas which occupied these geosynclines were at times connected across northern Mexico. 1988 Nature 4 Feb. 433/2 The faunal and floral assemblage from Las Hoyas seems..very similar to that of the classic Neocomian outcrops of Montsec. 1999 Bull. Amer. Assoc. Petroleum Geologists 83 1502/1 Synrift, lacustrine sedimentation took place along the entire eastern Brazilian margin in response to the Neocomian breakup of Gondwana. B. n. Frequently with the. The Neocomian period; the series of rocks laid down during this time.Now usually held to include the Berriasian, Valanginian, and Hauterivian stages of the Cretaceous (between approx. 144 and 125 million years ago) but sometimes applied to greater or lesser extents of the Cretaceous (see quot. 1982). ΘΚΠ the world > the earth > structure of the earth > age or period > [noun] > secondary or Mesozoic > Cretaceous > Cretaceous spec. Neocomian1845 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 1845 R. I. Murchison et al. Geol. Russia in Europe I. xii. 260 The lowest Greensand of English geologists..with its continental equivalent the Neocomian must be considered the true base of the Cretaceous system. 1872 Philos. Trans. (Royal Soc.) 162 37 Cryptocoenia has hexameral types in the Neocomian and in the Middle and Inferior Oolites. 1888 J. Prestwich Geol. II. 267 At the close of the Lower Neocomian. 1966 McGraw-Hill Encycl. Sci. & Technol. (rev. ed.) III. 543/2 During the Neocomian, the Tethys and Northern seas may have been connected by a strait through Poland. 1982 W. B. Harland et al. Geologic Time Scale ii. 30/2 Ever since Thurmann..coined the name Neocomian for strata in the vicinity of Neuchâtel, Switzerland, there has been confusion as to how much of the early Cretaceous Period should be embraced by the name. Some authors have used it to signify earliest Cretaceous up to and including the Valanginian Age; others have extended it to include the Barremian and even Aptian. We have followed the recommendation of Barbier, Debelmas and Thieuloy in the Colloque sur la Crétacé inférieur..that the Neocomian be regarded as an informal term embracing the lowest three stages of the Cretaceous, i.e. Berriasian, Valanginian and Hauterivian. This entry has been updated (OED Third Edition, September 2003; most recently modified version published online March 2022). < adj.n.1843
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