Skiddavianadj.
/skɪˈdeɪvɪən/ Geology.
= Skiddaw n. 2. Also absol.
ΘΚΠ
the world > the earth > structure of the earth > age or period > stratigraphic units > [adjective] > primary or Palaeozoic > Ordovician > specific
Caradoc1835
Tremadoc1847
Arenig1854
Skiddaw1897
Cincinnatian1899
Skiddavian1905
Caradocian1910
Tremadocian1910
1905 J. E. Marr in Q. Jrnl. Geol. Soc. LXI. p. lxxxi The time-divisions which I would..propose to adopt for the rocks of this [Ordovician] system are as follows:—Ashgillian. Caradocian. Llandeilian. Skiddavian.
1905 J. E. Marr in Q. Jrnl. Geol. Soc. LXI. p. lxxxii The beds tabulated above may..be taken as defining the upper and lower limits of the Skiddavian Series.
1905 J. E. Marr in Q. Jrnl. Geol. Soc. LXI. p. lxxxiii Didymograptus bifidus..belongs to the top of the Skiddavian.
1929 W. W. Watts in Evans & Stubblefield Handbk. Geol. Brit. Isles 63 The Skiddavian fauna includes many species of Didymograptus.
1929 W. W. Watts in Evans & Stubblefield Handbk. Geol. Brit. Isles 63 The Manx Slates of the Isle of Man are probably in part of Skiddavian age.
1955 G. G. Woodford tr. M. Gignoux Stratigr. Geol. iii. 83 (caption) Upper Skiddavian: shales and sandstones of the upper Arenig. Lower Skiddavian: basal sandstone of the Arenig.
This entry has not yet been fully updated (first published 1986; most recently modified version published online June 2018).
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adj.1905