Tortonianadj.

/tɔːˈtəʊnɪən/

Etymology: < German Tortonien, noun (K. Mayer 1857, in Verhandl. der allgemeinen schweiz. Ges. f. die gesammten Naturwiss. 171), < Tortona , name of a town in northern Italy: see -ian suffix.

Geology.

Of, pertaining to, or designating a stage of the upper (or middle) Miocene in Europe. Also absol., the Tortonian age.

ΘΚΠ

the world > the earth > structure of the earth > age or period > stratigraphic units > [adjective] > tertiary or Cenozoic > Miocene > specific

Tortonian1885

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

1885 A. Geikie Text-bk. Geol. (ed. 2) 873 Italy... The Tortonian stage (3) is made up [of] blue marls, reaching the great thickness of 3900 feet.

1931 J. W. Gregory & B. H. Barrett Gen. Stratigr. xii. 192 The volcanoes of the Rhine began in the Tortonian.

1974 Nature 22 Mar. 312/2 We suggest that the separation of Calabria from Sardinia took place in the middle Miocene, and that Tortonian deformation in Sicily indicates a collision that terminates this phase of separation.

This entry has not yet been fully updated (first published 1986; most recently modified version published online December 2019).

单词	tortonian
释义	Tortonianadj. /tɔːˈtəʊnɪən/ Etymology: < German Tortonien, noun (K. Mayer 1857, in Verhandl. der allgemeinen schweiz. Ges. f. die gesammten Naturwiss. 171), < Tortona , name of a town in northern Italy: see -ian suffix. Geology. Of, pertaining to, or designating a stage of the upper (or middle) Miocene in Europe. Also absol., the Tortonian age. ΘΚΠ the world > the earth > structure of the earth > age or period > stratigraphic units > [adjective] > tertiary or Cenozoic > Miocene > specific Tortonian1885 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 1885 A. Geikie Text-bk. Geol. (ed. 2) 873 Italy... The Tortonian stage (3) is made up [of] blue marls, reaching the great thickness of 3900 feet. 1931 J. W. Gregory & B. H. Barrett Gen. Stratigr. xii. 192 The volcanoes of the Rhine began in the Tortonian. 1974 Nature 22 Mar. 312/2 We suggest that the separation of Calabria from Sardinia took place in the middle Miocene, and that Tortonian deformation in Sicily indicates a collision that terminates this phase of separation. This entry has not yet been fully updated (first published 1986; most recently modified version published online December 2019). < adj.1885
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