Siegenianadj.
/siːˈɡɛnɪən/ 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.
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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).
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adj.1922