Siegenianadj.

/siːˈɡɛnɪən/

Etymology: < Siegen, name of a town and region in North Rhine-Westphalia, Germany, + -ian suffix.

Geology.

Pertaining to or designating a stage of the Lower Devonian in North-Western Europe, immediately above the Gedinnian, or the epoch or age during which it was deposited. Also absol.

ΘΚΠ

the world > the earth > structure of the earth > age or period > [adjective] > primary or Palaeozoic > Devonian > specific period

Coblenzian1853

Famennian1882

Frasnian1882

Givetian1882

Siegenian1922

the world > the earth > structure of the earth > age or period > stratigraphic units > [adjective] > primary or Palaeozoic > Devonian > specific

Helderberg1840

Coblenzian1853

Rhenan1853

Vergent1858

hercynian1880

Famennian1882

Frasnian1882

Givetian1882

Helderbergian1906

Siegenian1922

1922 Proc. Geologists' Assoc. 33 12 The higher horizon also includes many Siegenian species.

1928 E. Neaverson Stratigr. Palaeontol. xi. 255 In Britain..the Siegenian stage is best represented by the Meadfoot beds of South Devon.

1931 J. W. Gregory & B. H. Barrett Gen. Stratigr. vi. 96 In Spain and Portugal the Devonian is widely developed and includes a full succession from Siegenian to Famennian.

1967 M. R. House in W. B. Harland et al. Fossil Record i. 47 The goniatites appear in the mid-Siegenian as simple primitive types which soon diversify rapidly.

1979 R. Anderton et al. Dynamic Stratigr. Brit. Isles x. 130/2 Non-marine faunas of ostracoderm and placoderm fish fragments and plant remains..indicate a lower Devonian (Siegenian) age for the group.

This entry has not yet been fully updated (first published 1986; most recently modified version published online June 2021).

单词	siegenian
释义	Siegenianadj. /siːˈɡɛnɪən/ Etymology: < Siegen, name of a town and region in North Rhine-Westphalia, Germany, + -ian suffix. Geology. Pertaining to or designating a stage of the Lower Devonian in North-Western Europe, immediately above the Gedinnian, or the epoch or age during which it was deposited. Also absol. ΘΚΠ the world > the earth > structure of the earth > age or period > [adjective] > primary or Palaeozoic > Devonian > specific period Coblenzian1853 Famennian1882 Frasnian1882 Givetian1882 Siegenian1922 the world > the earth > structure of the earth > age or period > stratigraphic units > [adjective] > primary or Palaeozoic > Devonian > specific Helderberg1840 Coblenzian1853 Rhenan1853 Vergent1858 hercynian1880 Famennian1882 Frasnian1882 Givetian1882 Helderbergian1906 Siegenian1922 1922 Proc. Geologists' Assoc. 33 12 The higher horizon also includes many Siegenian species. 1928 E. Neaverson Stratigr. Palaeontol. xi. 255 In Britain..the Siegenian stage is best represented by the Meadfoot beds of South Devon. 1931 J. W. Gregory & B. H. Barrett Gen. Stratigr. vi. 96 In Spain and Portugal the Devonian is widely developed and includes a full succession from Siegenian to Famennian. 1967 M. R. House in W. B. Harland et al. Fossil Record i. 47 The goniatites appear in the mid-Siegenian as simple primitive types which soon diversify rapidly. 1979 R. Anderton et al. Dynamic Stratigr. Brit. Isles x. 130/2 Non-marine faunas of ostracoderm and placoderm fish fragments and plant remains..indicate a lower Devonian (Siegenian) age for the group. This entry has not yet been fully updated (first published 1986; most recently modified version published online June 2021). < adj.1922
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