Oligocenen.adj.

Brit.

/ˈɒlᵻɡə(ʊ)siːn/,

/ɒˈlɪɡə(ʊ)siːn/, U.S.

/ˈɑləɡoʊˌsin/,

/ˈoʊləɡoʊˌsin/

Origin: Formed within English, by compounding; modelled on a German lexical item. Etymons: oligo- comb. form, -cene comb. form.

Etymology: < oligo- comb. form + -cene comb. form, after German Oligocän (H. E. Beyrich 1854, in Bericht Bekanntmachung geeigneten Verhandlungen Königl. Preuss. Akad. Wissenschaften Berlin 664). Compare French oligocène (1881 as adjective, 1883 as noun).

Geology.

A. n.

With the. The third epoch of the Tertiary period or sub-era, which occurred between about 35 million and 23 million years ago, following the Eocene and preceding the Miocene; the series of rocks dating from this time.The Oligocene was a time of falling temperatures, with evidence of the first primates.

ΘΚΠ

the world > the earth > structure of the earth > age or period > [noun] > tertiary or Cainozoic > specific

Eocene1831

Pliocene1835

Miocene1842

post-Pliocene1852

Oligocene1856

Palaeocene1877

Palaeogene1882

Lutetian1895

Tortonian1931

1856 C. Lyell Let. 8 Aug. in Life, Lett. & Jrnls. (1881) II. 219 No matter whether the formation be called the lowest ‘oligocene’, according to Beyrich's nomenclature.

1882 A. Geikie Text-bk. Geol. vi. iv. ii. 857 Of these organisms a considerable proportion is common to the Lower Oligocene of France, Belgium, and Germany.

1910 H. F. Osborn Age of Mammals iv. 254 Of the microfauna we first observe among the castroids that the genus Chalicomys replaces the Steneofiber of the Oligocene.

1961 J. Stubblefield Davies's Introd. Palaeontol. (ed. 3) vi. 166 The origin of the Proboscidea..was long a mystery, until the discovery of more primitive allies in the Eocene and Oligocene of Egypt.

1990 M. Donoghue & A. Wheeler Dolphins (BNC) 27 Back beyond the Oligocene there is evidence only of archaeocetes, the rather large ancestral toothed whales.

B. adj.

Of, relating to, or designating this epoch.

ΚΠ

1859 D. Page Handbk. Geol. Terms 273 Oligocene,..employed by M. Beyrich to designate certain Tertiary beds of Germany..which appear to be neither exactly of Eocene nor of Miocene age, but to occupy an intermediate position.

1872 R. B. Smyth Mining Statist. 18 The Pliocene rocks of the Murray basin and those in Gipps Land, which..overlie Miocene and Oligocene and Eocene rocks.

1882 A. Geikie Geol. Sketches 281 As far back as Miocene or Oligocene times.

1968 Times 15 Nov. 8/7 The Old World monkeys were already differentiated from..man some 30 million years ago, during the Oligocene age.

1990 P. Kearey & F. J. Vine Global Tectonics viii. 178 In the north the oldest rocks on the volcanic arc are Oligocene and the sedimentary islands are underlain by rocks of Eocene age.

This entry has been updated (OED Third Edition, March 2004; most recently modified version published online March 2022).

单词	oligocene
释义	Oligocenen.adj. Brit. /ˈɒlᵻɡə(ʊ)siːn/, /ɒˈlɪɡə(ʊ)siːn/, U.S. /ˈɑləɡoʊˌsin/, /ˈoʊləɡoʊˌsin/ Origin: Formed within English, by compounding; modelled on a German lexical item. Etymons: oligo- comb. form, -cene comb. form. Etymology: < oligo- comb. form + -cene comb. form, after German Oligocän (H. E. Beyrich 1854, in Bericht Bekanntmachung geeigneten Verhandlungen Königl. Preuss. Akad. Wissenschaften Berlin 664). Compare French oligocène (1881 as adjective, 1883 as noun). Geology. A. n. With the. The third epoch of the Tertiary period or sub-era, which occurred between about 35 million and 23 million years ago, following the Eocene and preceding the Miocene; the series of rocks dating from this time.The Oligocene was a time of falling temperatures, with evidence of the first primates. ΘΚΠ the world > the earth > structure of the earth > age or period > [noun] > tertiary or Cainozoic > specific Eocene1831 Pliocene1835 Miocene1842 post-Pliocene1852 Oligocene1856 Palaeocene1877 Palaeogene1882 Lutetian1895 Tortonian1931 1856 C. Lyell Let. 8 Aug. in Life, Lett. & Jrnls. (1881) II. 219 No matter whether the formation be called the lowest ‘oligocene’, according to Beyrich's nomenclature. 1882 A. Geikie Text-bk. Geol. vi. iv. ii. 857 Of these organisms a considerable proportion is common to the Lower Oligocene of France, Belgium, and Germany. 1910 H. F. Osborn Age of Mammals iv. 254 Of the microfauna we first observe among the castroids that the genus Chalicomys replaces the Steneofiber of the Oligocene. 1961 J. Stubblefield Davies's Introd. Palaeontol. (ed. 3) vi. 166 The origin of the Proboscidea..was long a mystery, until the discovery of more primitive allies in the Eocene and Oligocene of Egypt. 1990 M. Donoghue & A. Wheeler Dolphins (BNC) 27 Back beyond the Oligocene there is evidence only of archaeocetes, the rather large ancestral toothed whales. B. adj. Of, relating to, or designating this epoch. ΚΠ 1859 D. Page Handbk. Geol. Terms 273 Oligocene,..employed by M. Beyrich to designate certain Tertiary beds of Germany..which appear to be neither exactly of Eocene nor of Miocene age, but to occupy an intermediate position. 1872 R. B. Smyth Mining Statist. 18 The Pliocene rocks of the Murray basin and those in Gipps Land, which..overlie Miocene and Oligocene and Eocene rocks. 1882 A. Geikie Geol. Sketches 281 As far back as Miocene or Oligocene times. 1968 Times 15 Nov. 8/7 The Old World monkeys were already differentiated from..man some 30 million years ago, during the Oligocene age. 1990 P. Kearey & F. J. Vine Global Tectonics viii. 178 In the north the oldest rocks on the volcanic arc are Oligocene and the sedimentary islands are underlain by rocks of Eocene age. This entry has been updated (OED Third Edition, March 2004; most recently modified version published online March 2022). < n.adj.1856
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